WORLDDSL TECHNICAL PRACTICE
PairGain 1
C C N LM N SY A SY
D
SL
2
AL
H
M
M
T RO I/F P SW
AL
LO C
LP BK
HiGain
PairGain
INTERNATIONAL
R EM
G.703
HDSL
V. 24
HDSL Line and Desktop Units
R C V G .7
BR
03
G
XM T
LTU-804 G.703
LTU-801 List 1A and List 1B LTU-802 List 1A and List 1B LTU-804 List 1A and List 1B UTU-801 List 1A, List 1B, and List 4 UTU-802 List 1A and List 1B UTU-804 List 1A and List 1B ETU-851 List 1 ETU-852 List 1
™700-804-100-06:¨
700-804-100-06
700-804-100-06, Revision 06
Revision History of This Practice
Revision
Release Date
Revisions Made
01P 02P 03 04 05 06
January 21, 1997 February 28, 1997 June 03, 1997 December 12, 1997 August 24, 1998 September 14, 2000
Initial release (errata sheet) Preliminary practice Software Upgrade and Related Features Added Internal Oscillator, Storage Temperature, and Storage Humidity specifications Added UTU, ETU, PTM, and Doubler Added List 1B and List 4 HDSL units.
Copyright September 14, 2000 © Copyright 2000 ADC DSL Systems, Inc. All Rights Reserved.
Trademark Information ADC is a registered trademark and WorldDSL is a trademark of ADC Telecommunications, Inc. HiGain is a registered trademark of PairGain Technologies, Inc. No right, license, or interest to such trademarks is granted hereunder, and you agree that no such right, license, or interest shall be asserted by you with respect to such trademark. Other product names mentioned in this practice are used for identification purposes only and may be trademarks or registered trademarks of their respective companies.
Disclaimer of Liability Information contained in this document is company private to ADC DSL Systems, Inc., and shall not be modified, used, copied, reproduced or disclosed in whole or in part without the written consent of ADC. Contents herein are current as of the date of publication. ADC reserves the right to change the contents without prior notice. In no event shall ADC be liable for any damages resulting from loss of data, loss of use, or loss of profits, and ADC further disclaims any and all liability for indirect, incidental, special, consequential or other similar damages. This disclaimer of liability applies to all products, publications and services during and after the warranty period.
ii
September 14, 2000
WorldDSL HDSL Line and Desktop Units
700-804-100-06, Revision 06
Using This Technical Practice
USING THIS TECHNICAL PRACTICE The following conventions are used in this manual: •
Monospace type indicates screen text.
•
Keys you press are indicated by small icons such as Y or ENTER . Key combinations to be pressed simultaneously are indicated with a plus sign as follows: CTRL + ESC .
•
Items you select are highlighted.
•
Three types of messages, identified by icons, appear in text. Notes contain information about special circumstances.
Cautions indicate the possibility of personal injury or equipment damage. Warnungszeichen deuten daruf hin, dass die Moeglichkeit von Schaden am Geraet oder eventueller Koerperverletzung besteht. The Electrostatic Discharge (ESD) susceptibility symbol indicates that a device or assembly is susceptible to damage from electrostatic discharge.
For a list of abbreviations used in this document, refer to “Appendix E - Abbreviations” on page 105.
INSPECTING SHIPMENT Upon receipt of the equipment: •
Unpack each container and inspect the contents for signs of damage. If the equipment has been damaged in transit, immediately report the extent of damage to the transportation company and to ADC DSL Systems, Inc. Order replacement equipment, if necessary.
•
Check the packing list to ensure complete and accurate shipment of each listed item. If the shipment is short or irregular, contact ADC DSL Systems, Inc. as described in “Returns” on page 103. If you must store the equipment for a prolonged period, store the equipment in its original container.
WorldDSL HDSL Line and Desktop Units
September 14, 2000
iii
700-804-100-06, Revision 06
iv
September 14, 2000
WorldDSL HDSL Line and Desktop Units
700-804-100-06, Revision 06
Table of Contents
TABLE OF CONTENTS Overview ____________________________________________________________________________ 1 Firmware ............................................................................................................................................1 Application Interfaces ........................................................................................................................2 HDSL Technology .............................................................................................................................3 Transmission Ranges .........................................................................................................................3 Front Panels........................................................................................................................................4 Rear Panels.........................................................................................................................................6 Safety and Equipment Repair ___________________________________________________________ 8 Safety .................................................................................................................................................8 Equipment Repair ..............................................................................................................................8 Installation___________________________________________________________________________ 9 HDSL Card Installation .....................................................................................................................9 ETU-851/852 Installation ................................................................................................................10 HDSL Self Test and Link Up...........................................................................................................11 System Configuration_________________________________________________________________ 12 Maintenance Terminal Connection ..................................................................................................12 Modem Connection..........................................................................................................................13 Logging On ......................................................................................................................................14 Console Screen Structure .................................................................................................................15 Reading and Navigating Menus.......................................................................................................17 Point-to-Point System Configuration...............................................................................................19 Configure Terminal Settings .............................................................................................20 Configure Date and Time ..................................................................................................21 Change Password...............................................................................................................22 Configure Circuit ID..........................................................................................................22 Configure System Settings ................................................................................................23 Configure LTU and NTU Interfaces .................................................................................26 Configure Alarms ..............................................................................................................29 Point-to-Multipoint System Configuration ......................................................................................33 Configure Basic Settings ...................................................................................................33 Configure PTM System Settings .......................................................................................34 Configure PTM LTU and NTU Interfaces ........................................................................35 Configure PTM Alarms .....................................................................................................38 Set to Factory Defaults.....................................................................................................................41 Logging Off......................................................................................................................................42
WorldDSL HDSL Line and Desktop Units
September 14, 2000
v
Table of Contents
700-804-100-06, Revision 06
Monitoring System Activity and Performance ____________________________________________ 43 Main Console Screen....................................................................................................................... 43 Monitor Menu.................................................................................................................................. 46 Monitor LTU Interface Screen.......................................................................................... 48 Monitor NTU Interface Screen ......................................................................................... 50 Monitor HDSL Span Screen ............................................................................................. 51 History Menu................................................................................................................................... 53 History LTU and History NTU Interface Menus.............................................................. 54 History HDSL Span Menus .............................................................................................. 57 Clear History Screens........................................................................................................ 61 Inventory Screen.............................................................................................................................. 61 Testing _____________________________________________________________________________ 64 Loopbacks........................................................................................................................................ 64 BER Testing .................................................................................................................................... 67 Loopback and BER Test Screens .................................................................................................... 68 Firmware Download Utility ____________________________________________________________ 72 Initiating the Firmware Download .................................................................................................. 73 Additional Safety Statements___________________________________________________________ 74 Appendix A - Specifications ____________________________________________________________ 75 Interface/System Specifications ...................................................................................................... 75 Appendix B - Functional Description ____________________________________________________ 78 Major Components .......................................................................................................................... 78 G.703 Interface.................................................................................................................. 79 Nx64k Interface................................................................................................................. 79 HDSL Interface ................................................................................................................. 80 System Timing Circuits .................................................................................................... 80 Processor ........................................................................................................................... 82 Local and Remote Power Supplies ................................................................................... 82 Application Modes and Options...................................................................................................... 83 Unstructured Mode ........................................................................................................... 83 Structured Mode................................................................................................................ 84 Point-to-Multipoint Mode ................................................................................................. 87 Time Slot Prioritization Mode .......................................................................................... 89 Single-Pair Mode .............................................................................................................. 90 Performance Monitoring and History.............................................................................................. 91 Alarms ............................................................................................................................................. 92 Service Channel............................................................................................................................... 93
vi
September 14, 2000
WorldDSL HDSL Line and Desktop Units
700-804-100-06, Revision 06
Table of Contents
Protection Switch .............................................................................................................................94 Hot Swapping...................................................................................................................................94 Connector and Connector Adapter Pinouts......................................................................................95 ETU-851 and ETU-852 Connector Pinouts.......................................................................95 ECA-800 Connector Adapter (DB25M to M34F for V.35) ..............................................96 ECA-801 Connector Adapter (DB25M to DB15F for X.21) ............................................97 ECA-802 Connector Adapter (DB9M to RJ-45) ...............................................................98 ECA-804 Connector Adapter (DB9M to Four-Position Terminal Block) ........................99 Appendix C - Compatibility __________________________________________________________ 100 Appendix D - Product Support ________________________________________________________ 102 Customer Assistance ......................................................................................................................102 Regional Sales Offices.....................................................................................................102 Ordering Procedure..........................................................................................................102 Technical Support ..........................................................................................................................103 Returns ...........................................................................................................................................103 Appendix E - Abbreviations __________________________________________________________ 105 Certification and Warranty______________________________________________ Inside Back Cover
WorldDSL HDSL Line and Desktop Units
September 14, 2000
vii
List of Figures
700-804-100-06, Revision 06
LIST OF FIGURES 1. Transport of Customer Voice and Video Service to an E1 Network.............................................................. 3 2. HDSL Card, ETU-851, and ETU-852 Front Panel Components ................................................................... 4 3. G.703 Bridge Jack........................................................................................................................................... 5 4. ETU-851 and ETU-852 Rear Panel Components........................................................................................... 7 5. HDSL Card G.703 Jumper Locations and Settings ........................................................................................ 9 6. V.24 Console Port and Maintenance Terminal Connector Pinouts .............................................................. 12 7. Connecting a Maintenance Terminal to a Line Unit..................................................................................... 13 8. Logon Password Screen................................................................................................................................ 14 9. Consolde Screen Menu Bar .......................................................................................................................... 14 10. Console Screen Structure.............................................................................................................................. 15 11. Console Screen Status Bar Display .............................................................................................................. 17 12. Point-to-Point Config Menu ......................................................................................................................... 19 13. Config Terminal Settings Screen .................................................................................................................. 20 14. Config Date and Time Screen....................................................................................................................... 21 15. Config Change Password Screen .................................................................................................................. 22 16. Config Circuit ID Menu................................................................................................................................ 22 17. LTU Config System Settings Menu.............................................................................................................. 23 18. UTU or ETU Config System Settings Menu ................................................................................................ 23 19. Config LTU Interface Menu ......................................................................................................................... 26 20. Config NTU Interface Menu......................................................................................................................... 26 21. Config Alarms Menu - Point-to-Point Applications..................................................................................... 29 22. Config Alarms LTU Interface Menu - Point-to-Point Applications............................................................. 30 23. Config Alarms NTU Interface Menu - Point-to-Point Applications ............................................................ 30 24. Config Alarms HDSL Span 1 Menu (no doubler) ........................................................................................ 31 25. PTM Config Menu........................................................................................................................................ 33 26. LTU System Settings Menu - PTM Application Mode ................................................................................ 34 27. UTU or ETU System Settings Menu - PTM Application Mode .................................................................. 34 28. Config LTU Interface Menu - PTM Mode ................................................................................................... 36 29. Config NTU2 Interface Menu - PTM Mode................................................................................................. 36 30. Config Alarms Menu - PTM Mode .............................................................................................................. 39 31. Config Alarms NTU2 Interface Menu - PTM Mode .................................................................................... 39 32. Config Alarms HDSL Span 1 Menu - PTM Mode ....................................................................................... 40 33. Set to Factory Defaults Screen...................................................................................................................... 41 34. Main Console Screen - LTU and NTU in Point-to-Point Application ......................................................... 43 35. Main Console Screen - LTU, NTU, and Doubler in Point-to-Point Application ......................................... 44 36. Main Console Screen - LTU and Two NTUs in Point-to-Multipoint Application....................................... 44 viii
September 14, 2000
WorldDSL HDSL Line and Desktop Units
700-804-100-06, Revision 06
List of Figures
37. Monitor Menu - Point-to-Point Application..................................................................................................46 38. Monitor Menu - Point-to-Point Application With Doubler...........................................................................47 39. Monitor Menu - Point-to-Multipoint Application .........................................................................................47 40. Monitor LTU Interface Screen - Point-to-Point Application ........................................................................48 41. Monitor LTU Interface Screen - Point-to-Point Application ........................................................................50 42. Monitor HDSL Span 1 Screen - Point-to-Point Appplication with No Doubler...........................................51 43. Monitor HDSL Span 2 Screen - Point-to-Point Appplication with One Doubler.........................................51 44. Monitor HDSL Span 1 Screen - Point-to-Multipoint Appplication ..............................................................52 45. History Menu - Point-to-Point Application with No Doubler.......................................................................53 46. History Menu - Point-to-Point Application with One Doubler .....................................................................53 47. History Menu - Point-to-Multipoint Appplication ........................................................................................54 48. History LTU Interface Menu.........................................................................................................................54 49. History NTU Interface Menu?.......................................................................................................................55 50. 24-Hour History Screen - LTU Interface Shown ..........................................................................................55 51. 7-Day History Screen - LTU Interface Shown..............................................................................................56 52. Alarm History Screen - LTU Interface Shown..............................................................................................57 53. History HDSL Span 1 Menu .........................................................................................................................58 54. 24-Hour History Screen - HDSL Span 1.......................................................................................................58 55. 7-Day History Screen - HDSL Span 1 ..........................................................................................................59 56. Alarm History Screen - HDSL Span 1 ..........................................................................................................60 57. Inventory Screen - Point-to-Point Application..............................................................................................61 58. Inventory Screen - Point-to-Point Application Using a Doubler ..................................................................62 59. Inventory Screen - Loop 1 of Point-to-Multipoint Application ....................................................................62 60. Point-to-Point, Point-to-Multipoint, and Doubler Loopback Paths...............................................................65 61. Test Screen for Point-to-Point Applications..................................................................................................68 62. Test Screen for Point-to-Point Application Using One Doubler...................................................................69 63. Test Screen for Point-to-Point Application Using Two Doublers.................................................................69 64. Test Screen for Point-to-Multipoint Application ..........................................................................................70 65. ETSI Firmware Download Utility Menu.......................................................................................................72 66. HDSL Line and Desktop Unit Functional Block Diagram ...........................................................................78 67. Transmission of Nx64k Serial Data ..............................................................................................................79 68. Transmission of Nx64k Serial Data onto an E1 Network .............................................................................79 69. Data Port Transmit Timing............................................................................................................................81 70. Typical Unstructured Mode Application.......................................................................................................83 71. Typical Structured Mode Application ...........................................................................................................85 72. Typical PTM Application..............................................................................................................................87 73. Time Slot Prioritization Application Designating Priority Workgroups.......................................................89
WorldDSL HDSL Line and Desktop Units
September 14, 2000
ix
List of Figures
700-804-100-06, Revision 06
74. Time Slot Prioritization Application Showing Pair Protection for Fractional Voice and Data Service....... 89 75. Single Pair Application ................................................................................................................................. 90 76. 1 + 1 Protection Switch Functionality .......................................................................................................... 94 77. ECA-800 DB25M to M34F (V.35) Connector Adapter ............................................................................... 96 78. ECA-801 DB25M to DB15F (X.21) Connetor Adapter............................................................................... 97 79. ECA-802 DB9M to RJ-45 Connector Adapter............................................................................................. 98 80. ECA-804 DB9M to Four-Position Terminal Block Connector Adapter ...................................................... 99
x
September 14, 2000
WorldDSL HDSL Line and Desktop Units
700-804-100-06, Revision 06
List of Tables
LIST OF TABLES 1. HDSL Line Unit Model and List Numbers, Interface(s), PTM Support, and LTU/NTU Application...........2 2. Transmission Ranges With and Without Doublers (0 dB ETSI Noise)..........................................................3 3. HDSL Card and ETU-851/852 Front Panel Components...............................................................................5 4. Front-Panel LED Indications ..........................................................................................................................6 5. ETU-851 and ETU-852 Rear-Panel Components...........................................................................................7 6. Console Screen Menu Bar Selections ...........................................................................................................16 7. Console Screen Status Bar Display...............................................................................................................17 8. Console Screen Navigation Keys..................................................................................................................18 9. Point-to-Point Config Menu Options............................................................................................................19 10. System Settings Options ...............................................................................................................................24 11. LTU and NTU Interface Menus....................................................................................................................27 12. V.35/V.36/X.21 Output Control Signal Operation .......................................................................................28 13. Alarms LTU and NTU Interface Menu.........................................................................................................31 14. HDSL Span 1 and Span 2 Menus..................................................................................................................32 15. PTM System Settings Options ......................................................................................................................35 16. LTU and NTU Interface Menus - PTM Mode..............................................................................................37 17. V.35/V.36/X.21 Output Control Signal Operation .......................................................................................38 18. PTM Alarms LTU and NTU1, NTU2 Interface Menu .................................................................................40 19. Alarms HDSL Span 1 Menu .........................................................................................................................41 20. Factory Default System Settings...................................................................................................................42 21. Reading the Main Console Screen ................................................................................................................44 22. Fields Displayed in Main Console Screens...................................................................................................45 23. Fields Displayed in Monitor LTU and NTU Interface Screens ....................................................................49 24. Fields Displayed in Monitor HDSL Span Screens........................................................................................52 25. Alarm History Data.......................................................................................................................................57 26. G.703 and Nx64k Alarm Parameters ............................................................................................................57 27. HDSL Span Alarm History Data ..................................................................................................................60 28. Inventory Screen Data...................................................................................................................................63 29. Loopbacks Selected at Front Panel Pushbutons and Console Screens .........................................................66 30. Loopback Equivalents...................................................................................................................................67 31. Test Screen Loopback Options .....................................................................................................................70 32. Test Screen BER Options .............................................................................................................................71 33. Firmware Download Menu Options .............................................................................................................73 34. Navigating the Firmware Download Menu ..................................................................................................73 35. Minimum Creepage and Clearance Distances ..............................................................................................74 36. Typical Unstructured Mode System Settings................................................................................................84 WorldDSL HDSL Line and Desktop Units
September 14, 2000
xi
List of Tables
700-804-100-06, Revision 06
37. Typical Structured Mode System Settings ................................................................................................... 85 38. Values for CRC-4 Modes ............................................................................................................................. 86 39. Typical PTM Mode System Settings............................................................................................................ 88 40. Monitored HDSL Transmission and Interface Performance Parameters ..................................................... 91 41. HDSL Transmission and Application Interface Alarms .............................................................................. 92 42. ETU-851 D15F 120-ohm G.703 Interface Connector Pinouts..................................................................... 95 43. Pinouts, ETU-851 BNC 75-ohm G.703 In and Out Connectors .................................................................. 95 44. ETU-851 and ETU-852 D9F HDSL Line Connector Pinouts ..................................................................... 95 45. ETU-852 D25F Data Port Connector Pinouts .............................................................................................. 96 46. ECA-800 DB25M to M34F (V.35) Connector Adapter Pinouts.................................................................. 97 47. ECA-801 DB25M to DB15F (X.21) Connector Adapter Pinouts................................................................ 98 48. ECA-802 DB9M to RJ-45 Connector Adapter Pinouts ............................................................................... 98 49. ECA-804 DB9M to Four-Position Terminal Block Connector Adapter Pinouts......................................... 99 50. HiGain ETSI Product Compatibility .......................................................................................................... 100 51. Regional Sales Offices ............................................................................................................................... 102
xii
September 14, 2000
WorldDSL HDSL Line and Desktop Units
700-804-100-06, Revision 06
Overview
OVERVIEW ADC’s WorldDSL™ family of E1 products include a wide variety of High-bit-rate Digital Subscriber Line (HDSL) Line Termination Units (LTUs), Network Termination Units (NTUs), Universal Termination Units (UTUs), and ETSI Termination Units (ETUs). The units are shelf and enclosure mounted and provide 2.048 Mbps transmission over two pairs of unconditioned copper wire. Public carriers and private network providers deploy these units to provide fiber-optic quality service using the local copper loop without conditioning the outside plant. The units comply with ETSI specification TS 101 135 and are defined as follows: •
LTU and NTU are defined by the European Telecommunication Standards Institute (ETSI) to distinguish between the two units in an HDSL system. An LTU is generally located at the Exchange Office end of the circuit and acts as the master unit. The NTU is located at the customer site and acts as the slave unit. An LTU must connect to an NTU, or to a UTU or ETU configured as an NTU. The LTU requires a -36 Vdc to -72 Vdc input power supply. The UTU, configured as an NTU, can either be locally powered or line powered from the LTU, using less than 120 V and 50 mA on each HDSL loop.
•
UTU is defined by ADC. They are programmable HDSL line units that can be configured as an LTU (master) or an NTU (slave). The default UTU configuration is NTU. The UTUs do not provide line power to other HDSL units. They can, however, receive power from an LTU or a local power supply. All other aspects of UTU functionality are identical to LTUs or NTUs with the same interface (G.703 or Nx64k).
•
ETU is defined by ADC. They are programmable HDSL line units housed in plastic enclosures. ETUs are equipped with interface and power connectors for convenient use as integrated desktop units. The ETUs can be configured as an LTU or an NTU. The default ETU configuration is NTU. The ETUs do not provide line power to other HDSL units. They can, however, receive power from an LTU or local power supply. All other aspects of ETU functionality are identical to LTUs or NTUs with the same interface (G.703 or Nx64k).
These HDSL line and desktop units are configured as Data Communications Equipment (DCE) and respond to data, clock, and control signals from the Data Terminal Equipment (DTE). Use of this product in a manner other than defined in this document may cause injury to personnel or damage to equipment. Falls der Gebrauch von diesem Produkt nicht gemaess der Definition in diesem dokument eingehalten wird, besteht die Gefahr, dass Schaden am Geraet oder sogar Koerperverletzungen entstehen koennten.
FIRMWARE The following firmware requirements apply to the subject HDSL line and desktop units: •
List 1 and 1A units must use HDSL unit firmware Version 3.xx and later. List 1B and List 4 units must use HDSL unit firmware Version 4.xx and later. Point-to-Multipoint (PTM) mode on List 1 and 1A units requires the use of firmware Version 3.10 and later. PTM on List 1B units requires the use of firmware Version 4.xx and later.
•
HDSL unit firmware Version 3.24 and later is required to support the CAS (Channel Associated Signaling) feature on units with the G.703 interface. Firmware Version 3.xx is backward compatible with firmware versions 2.00 or later. However, firmware Version 3.10 or later must be installed at both ends of the circuit to support PTM mode or doublers. To download the latest firmware, see “Firmware Download Utility” on page 72.
WorldDSL HDSL Line and Desktop Units
September 14, 2000
1
Overview
700-804-100-06, Revision 06
APPLICATION INTERFACES The application interfaces available are: •
G.703 interface port at fixed 2.048 Mbps E1 rate
•
synchronous serial data port at programmable Nx64k data rates.
The total available payload rate of 2.048 Mbps can be allocated to either one of these ports or divided between the two ports in time slot increments of 64 kbps each. Time slots not allocated to the G.703 port are replaced with an idle code at the G.703 port output. Time slots are mapped to each port using the Console screen menus or management unit. The mapped time slot configuration applies to both receive and transmit directions. Independent mapping can be selected at the remote unit so local E1 data can be transported to the remote serial data interface. The remote unit must use the same number of time slots allocated at the local E1 (for example, if the local E1 allocates 30 time slots, the remote unit serial data should also have 30 time slots, or 1920 kbps. The G.703 E1 application interface conforms with the ITU-T G.703 physical specification and can be configured for an impedance of 75 Ω unbalanced or 120 Ω balanced. User data can be unstructured or structured according to the G.704 framing standard, and optionally CRC-4 multiframed according to the G.706 standard. The Nx64k serial data interface complies with the V.35, V.36, X.21, or RS-530 (RS-449) standard based on the selection from the Console screen menus. Table 1 lists the line units covered in this practice and their application interface. Figure 1 on page 3 illustrates an application of G.703 and Nx64k interfaces for the transport of voice and video service from the customer to an E1 network. Table 1.
HDSL Line Unit Model and List Numbers, Interface(s), PTM Support, and LTU/NTU Application
Model
List Number (a)
Part Number
Interface (b)
PTM (c)
LTU/NTU Application
LTU-801
List 1A and 1B
150-1420-01A and -01B
G.703
Yes
LTU only
LTU-802
List 1A and 1B
150-1420-02A and -02B
Nx64k
No
LTU only
LTU-804
List 1A and 1B
150-1420-04A and -04B
G.703/Nx64k
Yes
LTU only
UTU-801
List 1A and 1B
150-1420-31A and -31B
G.703
Yes
LTU or NTU
UTU-801
4
150-1420-31W
G.703
Yes
NTU
UTU-802
List 1A and 1B
150-1420-32A and -32B
Nx64k
Yes (d)
LTU or NTU
UTU-804
List 1A and 1B
150-1420-34A and -34B
G.703/Nx64k
Yes
LTU or NTU
ETU-851
List 1
150-1430-01A
G.703
Yes
LTU or NTU
ETU-852
List 1
150-1430-02A
Nx64k
Yes
(d)
LTU or NTU
(a) The List 1A and List 1B line and desktop units are functionally identical. (b) See “Appendix B - Functional Description” on page 78 for more information on these interfaces. (c) Point to Multipoint (PTM) mode permits an LTU-801/804 to transmit up to half the 2.048 Mbps bandwidth to one NTU and the other half to a different NTU. (d) UTU-802 and ETU-852 must be configured as NTU in PTM circuits.
2
September 14, 2000
WorldDSL HDSL Line and Desktop Units
700-804-100-06, Revision 06
Overview
Customer Side
Network Side E1 Exchange Switch
G.703
Span 1
HIGAIN LTU-804
Span 2 EDU-840 Doubler
24 of 30 Channels
HIGAIN NTU-805
HDSL 1168 kbps (each pair)
Nx64k
G.703
E1
Nx64k
Customer DTE (PBX) Video In
V.36 (384 kbps)
Customer DTE (serial) Monitor
Figure 1.
Transport of Customer Voice and Video Service to an E1 Network
Models LTU/UTU-801 List 1A, LTU/UTU-804 List 1A, and ETU-851 List 1 must be Revision 20 or later to support PTM. Revision numbers are located on the Warranty Control Number (WCN) label of each HDSL card. See Figure 2 on page 4 and Table 3 on page 5 for the location and description of the WCN label and its revision level numbering system.
HDSL TECHNOLOGY HDSL is the core technology for ADC’s WorldDSL line of LTUs, UTUs, and ETUs. HDSL enables these units to transmit and receive digital data at 1168 kbps on each of two pairs of twisted copper wire to attain an aggregate bidirectional payload bit rate of 2.048 Mbps (the standard E1 rate). Both outbound and inbound signals are delivered on the same pair of wires by using echo cancellation techniques. The transmitted signal is canceled at the receiver by precisely predicting the amount of signal echo, then subtracting it from the overall input signal. ADC’s HDSL-based products tolerate crosstalk, and operate not only on continuous unobstructed pairs of wires, but also on cables with mixed wire gauges and bridged taps.
TRANSMISSION RANGES Transmission ranges are based on a signal attenuation of 35 dB at 292 kHz with 135 Ω terminations and assume the presence of noise according to the ETSI model described in TS 101 135. The expected Bit Error Rate (BER) under this noise model is 1x10-7. Reducing the number of interferers in the cable results in greater transmission distances. The reach of the system in such a noise environment is 2.8 km over 0.4 mm cable, but it can be extended by adding one or two HDSL doublers (EDU-840s) in the circuit. Table 2 lists the HDSL reach estimates (with and without doublers) over other gauge cables. The maximum (no noise) and typical case transmission ranges are listed in “Appendix A - Specifications” on page 75. Table 2.
Transmission Ranges With and Without Doublers (0 dB ETSI Noise)
Cable Gauge
Without Doubler
With One Doubler
With Two Doublers
0.4 mm (26 AWG)
2.8 km (9,186 ft.)
5.6 km (18,372 ft.)
7.1 km (23,294 ft.)
0.51 mm (24 AWG)
3.7 km (12,139 ft.)
7.2 km (23,621 ft.)
9.0 km (29,527 ft.)
0.64 mm (22 AWG)
4.8 km (15,748 ft.)
9.3 km (30,511 ft.)
11.8 km (38,713 ft.)
0.91 mm (19 AWG)
6.8 km (22,309 ft.)
13.0 km (42,650 ft.)
16.5 km (54,133 ft.)
WorldDSL HDSL Line and Desktop Units
September 14, 2000
3
Overview
700-804-100-06, Revision 06
FRONT PANELS The components on the HDSL card, ETU-851, and ETU-852 front panels are shown in Figure 2. These components are described in Table 3 on page 5 and Table 4 on page 6.
PairGain 1 SL
HDSL LEDs
2
AL
T RO I/F P SW
NC ALM YNC S
SY
I/F ALM LED
HD
AL
M
M
C LO
PROT SW LED
Loopback LEDs and push buttons
LP
BK
M RE
Bar code label (located on circuit side of line card)
V. 2
4
V.24 (RS-232) Console port RC V 03 .7 G
BR G T XM
G.703 bridge jack (LTU-801/804 and UTU-801/804 only)
LTU-801 G.703 V.35
Warranty control number label
HDSL Card
HDSL LEDs
Loopback LEDs and push buttons
V.24 (RS-232) console port
HiGain
G.703 bridge jack (ETU-851 only)
PairGain
INTERNATIONAL
G.703
HDSL
ETU-851 and ETU-852 Front Panels Figure 2. HDSL Card, ETU-851, and ETU-852 Front Panel Components
4
September 14, 2000
WorldDSL HDSL Line and Desktop Units
700-804-100-06, Revision 06
Overview
Table 3. HDSL Card and ETU-851/852 Front Panel Components Name
Function
HDSL Loop1 SYNC LED
Displays synchronization state for HDSL Loop1.
HDSL Loop2 SYNC LED
Displays synchronization state for HDSL Loop2.
HDSL Loop1 ALM LED
Displays alarm state for HDSL Loop1.
HDSL Loop2 ALM LED
Displays alarm state for HDSL Loop2.
I/F ALM LED
Displays alarm state for the G.703 and Nx64k ports.
PROT SW LED
Displays protection switching state. This LED is not present on ETU-851/852.
LOC LPBK LED
Displays local (LOC) loopback state.
LOC LPBK Button
Activates the local HDSL analog loopback (V.54 loop 3).
REM LPBK LED
Displays remote (REM) loopback state.
REM LPBK Button
Activates the remote interface loopback (V.54 loop 2).
V.24 (RS-232) Console port
Provides bidirectional communication between the unit and an external maintenance terminal through a V.24 (RS-232C) interface to allow configuration and performance monitoring through the Console screen menus as described in “System Configuration” on page 12. This connector can also be used to download new firmware to the line unit’s flash memory as described in “Firmware Download Utility” on page 72. This port is configured as DCE (see “Maintenance Terminal Connection” on page 12 for pinouts).
G.703 (E1) bridge (BRG) jack
Provides a bridge connection to the customer’s G.703 (E1) transmit (XMT) and receive (RCV) signals. The G.703 Bridge (BRG) connector provides front panel test access to the E1 data stream without disconnecting the rear panel connectors. Figure 3 illustrates the bridge jack wiring.
Bar code label
Contains the serial number and part number of the line card, as indicated in both bar code and text format. Also contains the configuration number of the line card, as indicated by "CFG: Rnn," where nn is the configuration number. For example, CFG: R07 would indicate line card configuration number 07.
Warranty control number label
Indicates the beginning year and month of the line card warranty. Also indicates the line card revision number. For example, a warranty control number of "703R07" would indicate a warranty beginning in the year 1997 (7), during the month of March (03), and line card revision number R07.
Figure 3.
WorldDSL HDSL Line and Desktop Units
G.703 Bridge Jack
September 14, 2000
5
Overview
700-804-100-06, Revision 06
Table 4 defines the system states indicated by the front panel LEDs. When power is applied to the unit, one of the LEDs listed in Table 4 will always be on. Table 4.
Front-Panel LED Indications
LED
Mode
Description
HDSL Loop1 SYNC LED HDSL Loop2 SYNC LED
• • • •
HDSL Loop is ready to transmit and receive data across all spans. HDSL Loop acquisition is in progress for local span. HDSL Loop acquisition is in progress for downstream span.(a) HDSL Loop is not configured (as in single-pair operation).
HDSL Loop1 ALM LED HDSL Loop2 ALM LED
• Steady red
Steady green Slow blinking Fast blinking Off
Loss of sync word (LOSW); or the margin is below the set margin alarm threshold; or ES count is above threshold on any span. Pulses for every Errored Second on any span. Normal transmit or receive data is in progress.
• Pulsing red • Off I/F ALM LED
• Blinking red
Loss of TT Clock (LOC) at Nx64k port; or receive AIS; or loss of frame alignment at G.703 port. Loss of EXT CLK (LOC) or Loss of Signal at G.703 port.
• Steady red (b)
PROT SW LEDs
LPBK LEDs(c)
PRIM
PROT
PRIM: Primary circuit card
PROT: Protection circuit card.
• Off
• Off
Protection switching feature is either not installed, is disabled, or the protection circuit has failed. If circuit has failed, an alarm is generated.
• Steady green
• Blinking green
Protection switching is enabled. Primary circuit is active, protection circuit idle.
• Off
• Steady green
Protection switchover has occurred. Primary circuit failed, protection circuit active.
LOC
REM
• Steady yellow
• Off
Local HDSL analog loopback is active.
• Off
• Off
No loopbacks are active.
• Blinking yellow
• Off
Local interface loopback is active.
• Off
• Steady yellow
Remote loopback is active.
• Blinking yellow
• Blinking yellow
A loopback away from the local equipment is active.
• Steady yellow
• Steady yellow
A doubler loopback toward the local equipment is active.
(a) The downstream span is the doubler to NTU span. (b) For more information on protection switch operation, see Technical Practice 700-839-100-xx, HiGain International Series Protection Module, Model EPS-831. (c) The LOC and REM LPBK LEDs are read in unison.
REAR PANELS The components on the ETU-851 and ETU-852 rear panels are shown in Figure 4 on page 7. These components are described in Table 5 on page 7. The pinouts for each connector on the ETU-851 and ETU-852 rear panels are listed in Table 42 through Table 45 (beginning on page 95). Pinouts for the ECA-80x series of connector adapters are listed in Table 46 through Table 49 (beginning on page 99).
6
September 14, 2000
WorldDSL HDSL Line and Desktop Units
700-804-100-06, Revision 06
Overview
D15F 120-ohm G.703 connector
120/75-ohm selection switch
D9F HDSL connector
BNC 75-ohm G.703 In Connector
BNC 75-ohm G.703 Out connector
DC power connector
On/Off switch
ETU-851 Rear Panel D25F Data port connector
D9F HDSL connector
DC power connector
DC POWER HDSL LINE
DATA PORT
-36V...-72V 0
On/Off switch
ETU-852 Rear Panel Figure 4.
ETU-851 and ETU-852 Rear Panel Components
Table 5.
ETU-851 and ETU-852 Rear-Panel Components
Item
Description
D15F 120-ohm G.703 connector (ETU-851 only)
Connects E1 balanced 120-ohm circuits to the enclosure. See Table 42 on page 95 for the 120-ohm G.703 interface connector pinouts.
120/75-ohm Selection switch (ETU-851 only)
Slide switch that allows you to select either the D15F 120-ohm G.703 interface connector, or the BNC 75-ohm In and Out G.703 interface connectors.
BNC 75-ohm In and Out G.703 connectors (ETU-851 only)
Connects E1 unbalanced 75-ohm circuits to the enclosure. See Table 43 on page 95 for the G.703 Input and Output connector pinouts.
D25F data port connector (ETU-852 only)
Connects Nx64k data circuits to the enclosure. See Table 45 on page 96 for the D25F data port connector pinouts.
D9F HDSL line connector
Connects the HDSL pairs to the enclosure. See Table 44 on page 95 for the D9F HDSL line connector pinouts.
DC power connector
Connects dc power to the enclosure.
On/Off switch
Toggle switch that allows you to turn the externally applied dc power on or off. The switch does not affect dc power which may be supplied through the HDSL loops.
WorldDSL HDSL Line and Desktop Units
September 14, 2000
7
Safety and Equipment Repair
700-804-100-06, Revision 06
SAFETY AND EQUIPMENT REPAIR SAFETY To ensure the safety of personnel and equipment, carefully observe the following safety rules: Bitte befolgen Sie die untenstehenden Sicherheitsbestimmungen, um die Sicherheit des Personals und der Geraete zu gewaehrleisten: Use of this product in a manner other than defined in this document may cause damage to equipment or injury to personnel. Falls der Gebrauch von diesem Produkt nicht gemaess der Definition in diesem dokument eingehalten wird, besteht die Gefahr, dass Schaden am Geraet oder sogar Koerperverletzungen entstehen koennten. Input voltage for the List 1B line cards (nominal -48 Vdc, tolerance -36 to -72 Vdc) must be supplied by an isolated DC source that complies with TNV or earthed SELV requirements of the latest version of IEC 950. Die Eingangsspannung fuer die 'List 1B' Karte is nominell –48 VDC, Toleranz -36 bis –72 VDC. Die Gleichstromquelle muss den Vorschriften gemäß der Norm EN60950 fuer Fernsprechnetzspannung (TNV) und Sicherheitskleinspannung (SELV) entsprechen. Be careful when installing or modifying telephone lines. Dangerous voltages can be present. It is unsafe to install telephone wiring during a lightning storm. Bitte beachten Sie, dass beim Installieren oder Veraendern von Telefonleitungen gefaehrliche Spannungen entstehen koennen. Es ist ebenfalls gefaehrlich, waehrend eines Gewitters Installationen an Telefondraehten vorzunehmen. Always disconnect all telephone lines and power connections before servicing or disassembling this equipment. All wiring external to the product should follow the local wiring codes. Bei Installation, Wartung oder Veraenderung des Geraetes muessen alle Telefon- und Netzkabel ausgezogen werden. Alle externen Verdrahtungsarbeiten sollten gemaess den Elektrizitaetsvorschriften des jeweiligen Landes ausgefuehrt werden.
EQUIPMENT REPAIR To ensure that the equipment does not become damaged, please observe the following: If a problem has been isolated to this unit, do not attempt to repair it. The unit's components are not user serviceable and, therefore, must not be replaced. Please return the unit to ADC for repairs. Wenn eine Störung auf dieses Gerät zurückgeführt werden kann, sollte man nicht versuchen es zu reparieren. Die Geräteteile sind nicht vom Endverbraucher zu warten und müssen darum nicht ersetzt werden. Bitte senden Sie das Geräet zur Reparatur zurueck an ADC.
8
September 14, 2000
WorldDSL HDSL Line and Desktop Units
700-804-100-06, Revision 06
Installation
INSTALLATION Emissions Compatibility: In countries requiring CE Mark, these units may not be installed in residential areas. Strahlungsvertraeglichkeit: Innerhalb der Laender welche unter die Richtlinien der Europaeischen Gemeinschaft fallen, duerfen diese Geraete nicht in Wohngebieten installiert werden.
HDSL CARD INSTALLATION Perform the following steps to install an HDSL card. Jumpers must be set on the HDSL cards with a G.703 interface. Proceed as follows before installing a G.703 HDSL card into a shelf or remote enclosure. 1
2
Jumper P8 complies with the ITU G.703 requirement to provide the option to connect the outer conductor of the coaxial pair or the screen of the symmetrical pair to earth (frame ground) at the G.703 input data port. Do one of the following: •
Do not install a jumper. This is the factory setting and provides the standard G.703 input port interface.
•
Short pins 1 and 2 of P8 to connect the screen of the symmetrical pair to earth for the 120 Ω input.
•
Short pins 2 and 3 of P8 to connect the outer conductor of the coaxial pair to earth for the 75 Ω input.
Jumper P11/P12 configures the HDSL card for use with a 75 Ω or 120 Ω G.703 interface. Place the four-position jumper block on one of the following: •
P11 for balanced 120 Ω circuits
•
P12 for unbalanced 75 Ω circuits (factory setting).
P8 (LIST 1B and LIST 4)
P8 (LIST 1A)
Figure 5. 3
P11
P12
HDSL Card G.703 Jumper Locations and Settings
Insert the HDSL card into the appropriate slot (1 through 16) of a shelf or into a single- or dual-slot enclosure.
WorldDSL HDSL Line and Desktop Units
September 14, 2000
9
Installation
700-804-100-06, Revision 06
The chassis ground of the shelf or remote enclosure receiving these units must be connected to earth ground for protection of the equipment and for the safety of personnel. Der Gehaeuseboden beim Einschub oder bei der Ferneinschließung, muß an die Masse angeschlossen werden, die dann für den Schutz der Ausrüstung und auch zur Sicherheit der Personen dient. Primary protection for the HDSL line must be provided by the user. Both primary and secondary protection must be provided by the user if the E1 line runs outside of the building. Der primaere Schutz des HDSL Anschlusses muss von der Benutzerseite aus geregelt werden. Wenn der E1 Anschluss ausserhalb des Gebaeudes installiert ist, muss der primaere und sekundaere Schutz von der Benutzerseite aus geregelt werden.
4
Connect the interface cabling and power connections using the procedures described in the technical practice for the shelf or remote enclosure in which the HDSL cards are installed.
5
Set the DTE to the correct data rate (or keep the DTE disconnected).
ETU-851/852 INSTALLATION Perform the following steps to install an ETU-851 or ETU-852 desktop unit. 1
a
On the ETU-851 rear panel, set the SELECT switch to the 120 or 75 position according to the DTE configuration (120 Ω balanced or 75 Ω unbalanced G.703 interface).
b
Connect either the 120 Ω cable or the 75 Ω input/output cables from the DTE to the mating connectors on the ETU-851 rear panel.
2
If using the ETU-852 with an Nx64k interface, connect the data port cable from the DTE to the mating connector on the ETU-852 rear panel.
3
For ETU-851 or ETU-852:
4
10
If using the ETU-851 with a G.703 interface:
a
Connect the HDSL line cable from the DTE to the mating connector on the ETU rear panel.
b
If using an EAC-850 Power Supply Module for local power (the ETU is not line powered by another unit), connect the EAC-850 dc supply cable to the DC power connector on the ETU rear panel.
Set the DTE to the correct data rate (or keep the DTE disconnected).
September 14, 2000
WorldDSL HDSL Line and Desktop Units
700-804-100-06, Revision 06
Installation
HDSL SELF TEST AND LINK UP Power up the line unit(s) and observe the HDSL self test and link up as follows: 1
Turn on the power supplied to the shelf or enclosure where the line unit(s) are installed. Each line unit performs a self test that lasts a few seconds after power-up. During this time, the front-panel LED indicators on each card flash in a binary-increment sequence to indicate the test is in progress. If the LEDs stop incrementing, the unit failed the self-test. Observe the LED pattern being displayed, then contact ADC customer service at (800) 638-0031.
2
The line units attempt to establish the HDSL link, and the HDSL SYNC LEDs flash once per second. After approximately 30 seconds, confirm the following: •
One or both of the HDSL SYNC LEDs are green and the corresponding HDSL ALM LED is off. The HDSL transmission line is ready to transmit and receive user data. The units are now ready for configuration through the Console screen menus. If the HDSL SYNC LEDs begin flashing again and the primary timing is set to the Nx64k data port clock, the DTE data rate may be mismatched with the Nx64k port setting. To correct this, the DTE data rate must be set to the same value as the unit's Nx64k data rate (discussed in Table 16 on page 37), or the DTE can be disconnected, which causes the unit to revert to internal timing.
•
One or both of the HDSL SYNC LEDs continue to flash. If the LEDs do not stop flashing after approximately one minute, it indicates that the HDSL transmission pair corresponding to the indicator is experiencing an excessive signal loss or is in an open condition. Check the line and repair if necessary.
•
An LTU holds the configuration settings for both itself and the remote NTU. After the two units establish sync, the LTU first checks if the remote NTU is the same type (that is, the same model number) as what existed prior to the units achieving sync. If the NTU type is the same, the LTU configures the NTU to previously established settings. If the NTU type is different, the LTU configures the NTU to its factory default settings (see “Set to Factory Defaults” on page 41).
WorldDSL HDSL Line and Desktop Units
September 14, 2000
11
System Configuration
700-804-100-06, Revision 06
SYSTEM CONFIGURATION Each line unit provides a system-wide view of the entire HDSL circuit, including the remote unit or units (PTM applications) and any doublers present. After establishing communication with the remote line card, provisioning options can be set and performance can be monitored from the LTU. If the HDSL link is down, the only parameters that can be changed are LTU parameters. The LTU has a special lockout feature that prevents users from changing the circuit configuration at the NTU. When this lockout feature is enabled, the maintenance terminal connected to the NTU is restricted to a read-only view of the HDSL system. The Console screen menus are not available at the line unit Console port when the line unit is under the control of a shelf management unit.
The line unit option settings are stored in non-volatile RAM (NVRAM) to prevent their loss in the event of a shelf power outage. No dip switches or jumpers are required to configure these options. These options are set from the Console screen menus or management unit interface. This section describes how to use the Console screen menu options to configure the line units. Use page 19 through page 31 to configure a point-to-point system and use page 33 through page 40 to configure a PTM system.
MAINTENANCE TERMINAL CONNECTION Using a standard RS-232 cable, connect a maintenance terminal or a PC running a terminal emulation program to the V.24 Console port on the front of the LTU, UTU, or ETU. The maintenance terminal is used to access the Console screen menus. Through these menus, the system is configured, monitored, tested, and its circuit inventory is displayed. Maintenance terminal DB-9 Connector (DTE)
4
LTU/UTU/ETU Console port
3 2
DB-9 Connector (DCE)
5 4
DTR (Data Terminal Ready)
3
TD (Transmit Data)
2
Rd (Receive Data)
5
Maintenance terminal DB-25 Connector (DTE)
GND
20 3 2 7
Figure 6. 12
V.24 Console Port and Maintenance Terminal Connector Pinouts September 14, 2000
WorldDSL HDSL Line and Desktop Units
700-804-100-06, Revision 06
System Configuration
Connect and configure a maintenance terminal: 1
Connect a serial cable from the maintenance terminal 9-pin COM port to the line unit Console port connector (Figure 7). Ensure the Data Terminal Ready (DTR) signal from the terminal is connected as the HDSL card will not communicate without it. Data Terminal Ready (DTR) may also be asserted by connecting the DSR output signal (pin 6) to the DTR input (pin 4).
Line unit
Maintenance terminal
Pai rG ain
9-pin COM port
Interface cable
Console port
Figure 7. Connecting a Maintenance Terminal to a Line Unit 2
Configure the maintenance terminal for the following communication settings: •
VT100 Emulation or ANSI (if VT100 is not available)
•
clear the modem initialization string if supported by the terminal
•
Bits per second: 1200, 2400, 4800, 9600 (default), or 19200 bps (recommended)
•
Data bits: 8
•
Parity: None
•
Stop bits: 1
•
Flow Control: None
If using a PC and Microsoft Windows terminal emulation program, deselect “Show Scroll Bars and Use Function, Arrow, and Ctrl Keys” from the Settings Terminal Preferences menu for Windows 3.1 or from the Properties menu for Windows 95.
MODEM CONNECTION For remote access to the line unit, a modem can be connected to the Console port. Use a null modem cable to connect the WorldDSL line unit and the modem. (For more information on modem connections and setup, see the EMU-830 management unit technical practice, section 700-030-100-xx.)
WorldDSL HDSL Line and Desktop Units
September 14, 2000
13
System Configuration
700-804-100-06, Revision 06
LOGGING ON To log on to the maintenance terminal Console screen: 1
Press the
SPACEBAR
several times to activate the autobaud feature and to display the Logon Password screen.
Figure 8.
Logon Password Screen
The ENTER key is the factory default password. If you create a new password, you must type the new password (single word, no spaces, up to eight characters) on a subsequent log on. If the system does not respond, verify that the Hardware Flow Control of the maintenance terminal is set to NONE.
2
Type the password at the prompt or press menu bar displays.
Figure 9. 14
ENTER
if a password has not been customized. The Console screen
Console Screen Menu Bar September 14, 2000
WorldDSL HDSL Line and Desktop Units
700-804-100-06, Revision 06
System Configuration
CONSOLE SCREEN STRUCTURE Figure 10 shows the Console screen structure. The menu bar displays the name of each menu and upper-level display screen. The upper-level display screens are Main, Test, Inventory, and Help. The menus are Monitor, History, and Config, which are used to select additional menus and display screens. Table 6 on page 16 describes the menus and display screens selected from the Console screen menu bar.
Password Screen
Menu bar
Main
Monitor
History
Config
Test
Display
LTU Interface
LTU Interface
System Settings
Display
HDSL Span #
HDSL Span #
LTU Interface
* NTU Interface
* NTU Interface
* NTU Interface
Displays
Clear 24 Hour History
Alarms
LTU Interface
Clear 7 Day History
Date and Time
HDSL Span #
Clear Alarm History
Password
* NTU Interface
Menus and Displays
Inventory
Display
Quit
Help
Display
Circuit ID Displays
Displays Terminal Settings Set to Fctry Dflts
Displays
Indicates drop-down menu * In PTM mode, two separate NTU Interface screens are displayed (NTU1 and NTU2). HDSL Span # is 1 with no doubler, 2 with one doubler, and 3 with two doublers.
Figure 10.
WorldDSL HDSL Line and Desktop Units
Console Screen Structure
September 14, 2000
15
System Configuration
700-804-100-06, Revision 06
Table 6.
16
Console Screen Menu Bar Selections
Selection
Function
Described in this section
Main
Displays the Main Console screen to view: • circuit configurations • performance summaries • alarm summaries
“Monitoring System Activity and Performance” on page 43.
Monitor
Opens a menu to view the 24-hour performance of the: • LTU interface • NTU interface • HDSL spans.
“Monitoring System Activity and Performance” on page 43.
History
Opens a menu to view the 24-hour, 7-day, or alarm history of the: • LTU interface • HDSL spans • NTU interface Also used to clear the 24-hour, 7-day, and alarm histories
“Monitoring System Activity and Performance” on page 43
Config
Opens a menu to view or configure: • system-wide operating parameters • LTU interface, HDSL span, or NTU interface operating parameters • alarm parameters • time and date • logon password • circuit ID • terminal settings Also used to set operating parameters to factory defaults
“System Configuration” on page 12.
Test
Opens a screen to: • set the loopback mode and location • set the loopback time-out • enable or disable loopback operation • initiate BER tests and monitor BER results
“Loopback and BER Test Screens” on page 68.
Inventory
Opens a screen to view: • circuit configuration • hardware product information • software product information
“Monitoring System Activity and Performance” on page 43.
Quit
Logs you off the system.
“System Configuration” on page 12.
Help
Opens a screen containing ADC and technical support phone numbers.
-
September 14, 2000
WorldDSL HDSL Line and Desktop Units
700-804-100-06, Revision 06
System Configuration
READING AND NAVIGATING MENUS The menu and status bars appear on all Console screens. The information on the rest of the screen varies depending on the function of the menu or screen. The menu bar displays the name of each menu and Console screen. Choosing Monitor, History, or Config from the menu bar drops down a menu of available options. When selected, all options on the Monitor menu, and the Alarm option on the Config menu, display drop-down submenus. The status bar at the bottom of the screen displays the circuit ID, the current date and time, unit type, and current system information. Select Config from the Console screen menu bar to enter or change the circuit ID and the current date and time. The items described in Table 7 correspond to the numbers shown in Figure 11 below. Use the keys described in Table 8 on page 18 to navigate the Console screen and its menus. Table 7. Item
Console Screen Status Bar Display
Field
Description
1
Circuit ID
Shows the user-selected name for the circuit (such as customer name).
2
Date and time
Today's date in dd/mm/yy format. Today's time in 24-hour format.
3
Protection switching
Protection switch status is displayed only if enabled. Refer to the technical practice for the EPS-831 module for additional information.
4
Unit Type
Either LTU or NTU.
5
System information
Displays the current system status. The system information field shows one of the following: • Loop down - At least one configured HDSL channel is down, either due to restart, or startup not completing. • Alarm - A major alarm condition is currently active in the system. In the case of a loopback bringing the loop down, LOSW alarms shall be ignored. • Loopback - The system is in a diagnostic loopback configuration. • Update - Circuit-wide provisioning is in progress. • Normal - All configured HDSL channels are up in the circuit, no alarms are present, and provisioning is complete.
1
2
3
4
5
Figure 11. Console Screen Status Bar Display
WorldDSL HDSL Line and Desktop Units
September 14, 2000
17
System Configuration
700-804-100-06, Revision 06
Table 8. Press this Key
To Perform this Function
Alphanumeric keys
Type the underlined or highlighted letter to select and execute a menu item. For example, on the Main Console menu, press C to access the Config menu. Also use these key to enter values in text fields. For example, on the Config Date and Time menu, type the date in a DD/MM/YY format.
↑
and
TAB ←
18
Console Screen Navigation Keys
↓
keys
key
and
→
Press the ↓ key from the Main Console screen to access a menu. For example, on the Main Console menu, press C and press the ↓ key to access the Config menu. Press the ↑ and ↓ keys to highlight a submenu item, then press ENTER to select the item. For example, press the ↓ key to highlight Config Alarms, then press ENTER to view the submenu. Provides same function as the
keys
CTRL
+ E and CTRL + X
CTRL
+ C and CTRL + R
↓
key.
Moves horizontally across the Menu bar, except when in a text entry field. CTRL
+ E moves up one line and CTRL + X moves down one line on the History screens.
CTRL + C performs page-down and CTRL + R performs page-up functions on the History screens.
SPACEBAR
Toggles among options displayed for current menu item. For example, to select the Application mode from the Config System Settings menu: • press the ↓ key to highlight the Application mode option, then • press the SPACEBAR until the desired option (UNSTRUCT, STRUCT, PTM, TSP, SINGLE) is highlighted and pressing ENTER to confirm the selection.
ESC
Exits the current screen and returns to the previous screen. Selection changes made on the current screen are discarded. Pressing ESC in a text field cancels the text entry and restores the old value.
ENTER
Submits all selection changes on the current screen and makes them effective in the system. Be sure to hit ENTER twice in order for numeric changes to take effect. However, when editing a text field, the first ENTER terminates editing and a second ENTER submits any changes.
September 14, 2000
WorldDSL HDSL Line and Desktop Units
700-804-100-06, Revision 06
System Configuration
POINT-TO-POINT SYSTEM CONFIGURATION Press C at the Console screen to display the point-to-point Config menu (Figure 12). Table 9 lists the point-to-point Config menu options and the recommended order of system configuration. See “Point-to-Multipoint System Configuration” on page 33 to configure a point-to-multipoint system.
Figure 12.
Point-to-Point Config Menu
Table 9. Point-to-Point Config Menu Options Use this Option
To:
On page:
Terminal Settings
Select the best viewing mode for the Console.
20
Date and Time
Set the system date and time.
21
Password
Set or change the system password.
22
Circuit ID
Assign a circuit ID.
22
System Settings
Select and configure system-wide operating parameters.
23
LTU and NTU Interface
Select and configure LTU/NTU-specific operating parameters.
26
Alarms
Enable or disable alarms and to select alarm severity.
30 and 31
Set to Factory Dflts
Reset all operating parameters to factory settings.
41
Observe the following when configuring a system: •
Configure the system in the order specified in Table 9. The System Settings on page 23 must be configured before the LTU and NTU Interface settings. Changing System Settings can clear the settings made in the LTU and NTU Interface menus.
•
When using two ETUs or UTUs in the same circuit, change the Local Unit Role to LTU for the unit used to configure the system (see Figure 18 on page 23). Note that changing the Local Unit Role of a UTU or ETU causes the unit to reset and its LEDs to cycle.
•
When the HDSL units are reset or cycle power, the date setting is preserved but the time setting is not preserved. Set the time using the Config Date and Time screen on page 21. When the HDSL units are turned off and left off for a long period of time (more than 24 hours, for example), neither the date or time is preserved and each must be reset.
WorldDSL HDSL Line and Desktop Units
September 14, 2000
19
System Configuration
700-804-100-06, Revision 06
Configure Terminal Settings The Console screens use line drawing characters to enclose menu selections and dialog boxes. Because not all maintenance terminals and terminal emulation programs adhere consistently to the VT100 standard, the HDSL card allows you to adjust the display for best results on a given terminal.
1
Press
T
at the Config menu to display the Terminal Settings screen (Figure 13).
Figure 13. 2
3
20
Config Terminal Settings Screen
Press the ← or → key to highlight the selection that matches the terminal configuration (which should also be the selection most clearly displayed on the monitor). The choices are: •
VT100
•
IBM PC
•
ASCII
•
WINDOWS TERMINAL
Press
ENTER
to confirm the selection.
September 14, 2000
WorldDSL HDSL Line and Desktop Units
700-804-100-06, Revision 06
System Configuration
Configure Date and Time 1
Press
D
at the Config menu to display the Date and Time screen (Figure 14).
Figure 14.
Config Date and Time Screen ENTER .
2
Type the date in DD/MM/YY format, then press
3
Type the time in HH/MM format (24-hour clock), then press
ENTER .
The system date and time appear on the status line of the Console screen and is useful when viewing alarm histories. When the HDSL units are reset or cycle power, the date field is preserved but the time field is not preserved. Set the time using the Config Date and Time screen. When the HDSL units are turned off and left off for more than 24 hours, set both the date and time using the Config Date and Time screen since neither value was preserved. Changing the date and time after the system has been running will not automatically clear alarm histories. This must be done after setting the date and time.
WorldDSL HDSL Line and Desktop Units
September 14, 2000
21
System Configuration
700-804-100-06, Revision 06
Change Password 1
Press
P
at the Config menu to display the Change Password screen (Figure 15).
Figure 15.
Config Change Password Screen
2
Enter a new password (up to eight characters) to change the current system password.
3
Retype the new password (up to eight characters) to confirm its accuracy. When changing the default password ( ENTER ), save the new password in a secure place. A password cannot be recovered if it is forgotten. Contact ADC Technical Support if assistance is needed (see page 103).
Configure Circuit ID The circuit ID appears on the status line of each Console screen. Choose a unique circuit ID for each HDSL card. 1
Press
C
at the Config menu to display the Circuit ID screen (Figure 16).
Figure 16. 2 22
Config Circuit ID Menu
Type a new circuit ID (up to 23 characters) to change the current circuit ID. September 14, 2000
WorldDSL HDSL Line and Desktop Units
700-804-100-06, Revision 06
System Configuration
Configure System Settings Use the System Settings screen to select and configure system-wide operating parameters. Configure the system settings as follows: When changing application mode settings, the new interface defaults override existing values. It is recommended that you select the application mode before setting the interface options (see “Configure LTU and NTU Interfaces” on page 26).
1
Press S at the Config menu to display the System Settings screen. Figure 17 shows the System Settings screen for an LTU.
Figure 17.
LTU Config System Settings Menu
When connecting two LTU/NTU configurable units (UTUs or ETUs), log in to the Console screen menus and configure one unit as an LTU. Let the other remain as the default NTU.
Figure 18 shows the System Settings menu for a UTU or ETU.
Figure 18. WorldDSL HDSL Line and Desktop Units
UTU or ETU Config System Settings Menu September 14, 2000
23
System Configuration
2
700-804-100-06, Revision 06
Do the following for each menu item to be changed. Table 10 describes the fields displayed on the System Settings menus. When using a UTU or ETU as an LTU, configure the Local Unit Role option first. •
Use the
←
•
Use the
SPACEBAR
or the
→
key to select the menu item to be changed. to select to the appropriate setting, then press Table 10.
ENTER
to accept the setting.
System Settings Options
Menu Item and Options
Description
Application mode
For more information, see “Application Modes and Options” on page 83. Select one of the following modes:
UNSTRUCT
Enables the system to operate in the unstructured application mode. For more information, see “Unstructured Mode” on page 83. Use this mode when both the LTU and NTU ends of the network both are a: • G.703 port at 2.048 Mbps and not using G.704 framing • Nx64 kbps port with both ends configured for the same data rate (up to 2.048 Mbps)
STRUCT
Enables the system to operate in the structured application mode. For more information, see “Structured Mode” on page 84. Use this mode when: • G.703 interface is framed in accordance to G.704 (fractionally using the bandwidth) • time slots are used by both the G.703 interface and Nx64k serial data interface
PTM
Enables the system to transmit payloads to two separate NTUs using one HDSL pair for each NTU. For more information, see “Point-to-Multipoint Mode” on page 87.
TSP
Enables the system to operate in time slot prioritization where the user designates high and low priority traffic, ensuring delivery of up to half the payload if one of the pairs failed. Enabling this option changes HDSL line mapping from the standard odd/even format to an upper/lower format where time slots 0-16 are transported on HDSL Loop1; and time slots 0 and 16 are transported on HDSL Loop2. In the case of a degradation or failure of Loop1, time slots 0-16 are switched over to HDSL Loop2. For more information, see “Time Slot Prioritization Mode” on page 89.
SINGLE
Enables the system to operate using time slots 0-16 on one single-pair wire. In this mode, only Loop1 on the LTU and NTU is used. For more information, see “Single-Pair Mode” on page 90.
Remote Power Feed mode
A two-pair configuration must be used when feeding power over the HDSL loops. The NTU must be locally-powered when using the single-pair, time slot prioritization, or point-to-multipoint application modes. The LTU can feed power to the NTU, UTU, or ETU (80x models), but the NTU, UTU, and ETU (80x models) cannot feed power to the LTU. The Remote Power Feed selection can be made from either the LTU or the NTU Console interface. If local power is applied to the NTU, and line power is enabled, line power will not take effect until local power is removed. If line power is applied to the NTU and local power is enabled, the NTU still operates under line power. An important feature of the Remote Power Feed mode is the ability to provide power redundancy. Up to three sources of power are available to an NTU: • line power • application of local dc power (-48V nominal) • application of local ac power (110-240V); availability of local power depends on the shelf, enclosure, or desktop unit used. If any one of these sources fail, the system reverts to the next available source. The letters RPF are displayed on the Main screen when the LTU is power feeding the NTU.
Select one of the following for the Remote Power Feed mode: NONE
Disables the remote power feed mode. The NTU must be locally powered.
POWER
Enables the LTU to supply parallel power (full power) to the NTU via the HDSL loops.
WETTING
Enables the LTU to supply a low voltage dc current when not supplying full power. Wetting is used to prevent corrosion of HDSL lines and connections. The NTU must be locally powered when selecting this option. (Continued)
24
September 14, 2000
WorldDSL HDSL Line and Desktop Units
700-804-100-06, Revision 06
System Configuration
Table 10.
System Settings Options (Cont.)
Sub-menu Item and Options
Description
Remote Power Feed Loop
No option; always displays BOTH.
BOTH Remote Console Access
The LTU uses both HDSL Loop1 and HDSL Loop2 for remote power feeding. Selects whether a maintenance terminal connected to an NTU can affect system changes or is read-only. This field may be set only at the LTU:
ALLOWED
NTU Console screens can be used to configure the system.
BLOCKED
NTU Console screens are read-only. The LOC and REM pushbuttons on the NTU are also disabled. System changes can only be made from the LTU.
Protection Switch Command (shelf mounted units only)
Selects one of the three protection switch options. For more information, see “Protection Switch” on page 94.
DIS
Disables the protection switch mode.
ENA
Enables the protection switch mode.
MAN
Simulates protection failure condition and manually switches data over to the protection (backup) circuit.
Local Unit Role (available on UTUs and ETUs only)
Configures UTU or ETU as LTU (master) or NTU (slave). The default configuration is NTU (slave). Note that changing the Local Unit Role of a UTU or ETU causes the unit to reset and the LEDs to cycle.
LTU
Configures UTU or ETU as LTU (master). The LTU-configured UTU/ETU does not provide line power to other HDSL units.
NTU
Configures UTU or ETU as NTU (slave). The NTU-configured UTU/ETU cannot receive power from another UTU or ETU; it can, however, receive power from an LTU-80x.
WorldDSL HDSL Line and Desktop Units
September 14, 2000
25
System Configuration
700-804-100-06, Revision 06
Configure LTU and NTU Interfaces Select and configure the LTU- and NTU-specific operating parameters using the Config LTU or NTU Interface menus. When changing application mode settings, the new interface defaults override existing values. It is recommended that you select the application prior to selecting the interface configuration.
1
Press one of the following keys at the Config menu to display the LTU or NTU Interface menu: •
L
for the LTU Interface menu
•
N
for the NTU Interface menu
Figure 19 shows the LTU Interface menu.
Figure 19.
Config LTU Interface Menu
Figure 20 shows the NTU Interface menu.
Figure 20. 26
Config NTU Interface Menu September 14, 2000
WorldDSL HDSL Line and Desktop Units
700-804-100-06, Revision 06
2
System Configuration
Do the following for each interface option to be changed. Table 11 describes the fields displayed on the LTU and NTU Interface menus. •
Use the
←
•
Use the
SPACEBAR to toggle to the appropriate option or type in the correct information, then press to select the option.
ENTER
or the
→
key to select the sub-menu item to be changed.
There is a known problem with certain idle codes inserted incorrectly into Time slot 31 (last channel in the G.704 frame). Use only the following idle codes: • 0xFF (all ones) for AIS or channel filler • 0xD5 analog idle for A-law PCM • 0x7E idle code for High-level Data Link Control (HDLC) digital channels
Table 11.
LTU and NTU Interface Menus
Field
Description
Primary Timing Source:
Selects the source of clock for the HDSL transmit direction. The choices are: • G.703 - E1 recovered clock • INT - Internal Oscillator • Nx64k - Nx64k Serial Data port receive clock (TT) • HDSL - Recovered clock from received HDSL data If time slots are assigned to G.703, the only allowed options are G.703 and EXT.
CRC-4 mode
In structured application mode, selects whether CRC-4 detection and generation is disabled (DIS), enabled (ENA) or passed through (PASSTHRU) at the LTU or NTU G.703/704 port. The CRC-4 modes are not applicable (N/A) in the unstructured application mode.
CAS mode
In structured application mode, selects whether the MA (Multiframe Alignment) signal is: passed through (PASSTHRU) – does not alter the time slot 16 information going to the G.703 interface. It is a transparent mode. Is inserted (INSERT – Inserts bit values 00001011 into time slot 16 of frame 0 and 10111011 into time slot 16 of frames 1 through 15 of each 16-frame multiframe transmitted to the G.703 interface. IDLE – Inserts a user-selected idle code into time slot 16 of every frame going to the G.703 interface.
Idle Code
User inputs the idle pattern (from 00 to FF) transmitted in unused time slots from the LTU or NTU G.703/ 704 port. See preceding note about correct idle codes to use.
Data Rate/# of TSs
To specify the bandwidth transmitted to or from the LTU/NTU G.703 port, the user inputs either: • the data rate from 64 to 1920 kbps (for example, 64 or 256 or 1920) • number of DS0 time slots up to 30 (for example, 1 or 4 or 30) When either value is entered, the other value automatically displays after pressing ENTER .
Beginning TS
The user inputs the number of the beginning time slot in the E1 frame transmitted from the LTU or NTU G.703 port. Options are 1-15 and 17-31.
AIS mode
Specifies which mode the LTU/NTU uses to assert an Alarm Indication Signal (AIS). The FULL AIS mode asserts the Alarm Indication Signal when one loop is down. The HALF AIS mode asserts the Alarm Indication Signal when both loops are down. Used with Structured mode.
G.703 Port
Continued
WorldDSL HDSL Line and Desktop Units
September 14, 2000
27
System Configuration
700-804-100-06, Revision 06
Table 11. Field
LTU and NTU Interface Menus (Cont.)
Description Nx64k Port
Interface Type
Select the interface standard for serial data port. The options are: V.35, V.36, X.21, and RS-530. See Table 12 for details about the interface types.
Data Rate/# of TSs
To specify the bandwidth transmitted to or from the LTU/NTU Nx64k serial data port, the user inputs either: • the data rate from 64 to 2048 kbps (for example, 64 or 256 or 2048) • number of DS0 time slots up to 32 (for example, 1 or 4 or 32) When either value is entered, the other value automatically displays after pressing ENTER . The data rate of 2048 applies to unstructured mode.
Beginning TS
In structured application mode, selects the number of the beginning time slot of the E1 frame from which serial data at Nx64k port is inserted or extracted. Options are 1-15, and 17-31. In unstructured mode, beginning TS is always 0.
Transmit Clock
Selects the transmit data (SD) clock as External (EXT), Internal Rising Edge (INT_RISING), or Internal Falling Edge (INT_FALLING). Transmit clock is always EXT if the Timing Source is Nx64k. For more information, see “System Timing Circuits” on page 80.
CTS DSR RLSD
Specifies one of three methods the LTU/NTU uses to generate the CTS, DSR, and RLSD control signals for the V.35/V36 port. The V.35/V.36 port is hardware-configured as DCE. Set each of these parameters to match the requirements of the application. The choices are: • STD (standard) - The output control signal follows the ITU standards • ON (force ON) - Control signal is always ON • OFF (force OFF) - Control signal is always OFF
LL/RL
Selects whether the LTU/NTU responds to (enabled) or ignores (disabled) the Local Loopback (LL) and Remote Loopback (RL) input control signals. When enabled (ENA), the status of local and remote loopbacks appears on the Test screen.
Table 12 describes the operation of the V.35/V.36/X.21 output control signals. Table 12. State
V.35/V.36/X.21 Output Control Signal Operation
Condition
Control Signals
Output Data
(a)
1
HDSL link down
CTS = OFF DSR = DTR RLSD = OFF TM = OFF
RD = all ones
2
HDSL link up
CTS = RTS(a) DSR = DTR(a) RLSD = ON TM = OFF
RD = normal data
3
Self-test or remote unit issued a loopback away from local unit
CTS = (link) DSR = OFF RLSD = (link) TM = ON
RD = (link)
4
Local unit issued any loopback
CTS = (link) DSR = ON RLSD = (link) TM = ON
RD = looped data
(a) DTR and RTS are inputs received from the customer’s DTE. RLSD performs as defined in states 1 and 2: its state is determined by the HDSL link being up or down.
28
September 14, 2000
WorldDSL HDSL Line and Desktop Units
700-804-100-06, Revision 06
System Configuration
Configure Alarms Use the Config Alarms menu to configure LTU and NTU Interface alarm parameters and the HDSL span alarm parameters. When setting alarm parameters for LTUs and NTUs, keep the following rules in mind: •
Disabled alarms do not cause LED indications and are not stored in history. Console screen menu alarm history reports are not generated.
•
Minor alarms cause LED indications and are stored in history. Console screen menu alarm history reports are generated.
•
Major alarms cause LED indications, actuate the line unit alarm relay, and are stored in history. Console screen menu alarm history reports are generated.
•
Protection switch alarms are equivalent to Major alarms. They cause LED indications, actuate the line unit alarm relay, cause the G.703 data to be switched to the protection (backup) circuit, and are stored in history.
•
The LTU alarm relay activates in response to a major alarm at the LTU only.
•
The NTU alarm relay activates in response to a major alarm at the NTU only.
•
For the duration of a major alarm, the line unit alarm relay contacts are connected as follows: –
The C (Common) contact is connected to the NO (Normally Open) contact.
–
The NC (Normally Closed) contact is floating.
•
With no alarm, the C and NC contacts are connected, and the NO contact remains floating.
•
The line unit alarm relay operates in a fail-safe mode. When no power is applied to the line unit, the alarm relay C and NO contacts are connected with the NC contact floating.
Press A at the Config drop-down menu to display the Alarms menu. Figure 21 shows the Alarms menu for point-to-point applications.
Figure 21.
WorldDSL HDSL Line and Desktop Units
Config Alarms Menu - Point-to-Point Applications
September 14, 2000
29
System Configuration
700-804-100-06, Revision 06
Alarms for LTU and NTU Interface 1
Press one of the following keys at the Config menu to display the LTU or NTU Interface menu: •
L
for the LTU Interface menu
•
N
for the NTU Interface menu
Figure 22 shows the Config Alarms LTU Interface menu for point-to-point applications. Figure 23 shows the Config Alarms NTU Interface menu.
2
Figure 22.
Config Alarms LTU Interface Menu - Point-to-Point Applications
Figure 23.
Config Alarms NTU Interface Menu - Point-to-Point Applications
Do the following for each interface option to be changed. The fields displayed on the LTU and NTU Interface menus are described in Table 13 on page 31. •
Use the
←
•
Use the
SPACEBAR to toggle to the appropriate option or type in the correct information, then press to select the option.
ENTER
30
or the
→
key to select the sub-menu item to be changed.
September 14, 2000
WorldDSL HDSL Line and Desktop Units
700-804-100-06, Revision 06
System Configuration
Table 13.
Alarms LTU and NTU Interface Menu
Field
Description
Loss of Signal (LOS)
Selects whether the alarm is disabled (DIS), or enabled and reported as a Minor (MIN) or Major (MAJ) alarm when the LOS condition occurs.
Loss of Frame Align (LFA)
Selects whether the alarm is disabled (DIS), or enabled and reported as a Minor (MIN) or Major (MAJ) alarm when the LFA condition occurs.
Receive Alarm Indication Signal (AIS)
Selects whether the alarm is disabled (DIS), or enabled and reported as a Minor (MIN) or Major (MAJ) alarm when the AIS condition occurs.
Remote Alarm Indication Signal (RAI)
Selects whether the alarm is disabled (DIS), or enabled and reported as a Minor (MIN) or Major (MAJ) alarm when the RAI condition occurs.
Loss of Clock (LOC)
If time slots are mapped to the Nx64k interface, selects whether the alarm is disabled (DIS), or enabled and reported as a Minor (MIN) or Major (MAJ) alarm when the LOC condition occurs following a loss of the DTE transmit clock (TT).
Loss of Clock (LOC)
Selects whether the alarm is disabled (DIS), or enabled and reported as a Minor (MIN) or Major (MAJ) alarm when the LOC condition occurs following a loss of the external clock.
HDSL Span Alarms 1
Press 1 at the Config menu to display the Alarms HDSL Span 1 menu which shows a system with no doubler (Figure 2). When a doubler is present, the display shows an Alarms HDSL Span 2 menu.
Figure 24. 2
Config Alarms HDSL Span 1 Menu (no doubler)
Do the following for each interface option to be changed. The fields displayed on the Alarms HDSL Span 1 menu are described in Table 14 on page 32. •
Use the
←
•
Use the
SPACEBAR to toggle to the appropriate option or type in the correct information, then press to select the option.
ENTER
or the
→
WorldDSL HDSL Line and Desktop Units
key to select the submenu item to be changed.
September 14, 2000
31
System Configuration
700-804-100-06, Revision 06
Table 14.
HDSL Span 1 and Span 2 Menus
Field
Description
Margin (MAR)
Selects whether the alarm is disabled (DIS), or enabled and reported as a Minor (MIN) or Major (MAJ) Alarm when the margin falls below the threshold. This indicates a potential degradation of line quality. If an alarm is configured as a protection switch (PSW), it will behave as a Major (MAJ) Alarm, and cause protection switching to engage.
Margin Threshold
Selects the margin alarm threshold (from 0 dB to 15 dB) for all four margin measurements of the span.
Errored Seconds (ES)
Selects whether the alarm is disabled (DIS), or enabled and reported as a Minor (MIN) or Major (MAJ) Alarm when 24-hour ES count exceeds the threshold.
24 Hr ES Threshold
Selects the errored seconds threshold (0 to 255) for all four errored seconds measurements of the span measured over a 24-hour period.
Loss of Sync Word (LOSW)
Selects whether the alarm is disabled (DIS), or enabled and reported as a Minor (MIN) or Major (MAJ) Alarm when the LOSW condition (HDSL loop down) occurs.
Power Feed Open (PFO)
Selects whether the alarm is disabled (DIS), or enabled and reported as a Minor (MIN) or Major (MAJ) Alarm when the PFO condition occurs.
Power Feed Short (PFS)
Selects whether the alarm is disabled (DIS) or enabled and reported as a Minor (MIN) or Major (MAJ) Alarm when the PFS condition occurs.
32
September 14, 2000
WorldDSL HDSL Line and Desktop Units
700-804-100-06, Revision 06
System Configuration
POINT-TO-MULTIPOINT SYSTEM CONFIGURATION Press
C
at the main Console screen to display the PTM Config menu (Figure 25).
See “Point-to-Point System Configuration” on page 19 to configure a point-to-point system.
Figure 25. PTM Config Menu Perform the sections that follow to configure the PTM system HDSL cards, including configuration for both the LTU and NTU units. The following hints are useful when configuring a system: •
When implementing PTM mode, the Main screen does not show the two remote NTU units in the system until PTM mode is selected from the System Settings menu.
•
When using a UTU as an LTU, change the Local Unit Role for the unit using the Config System Settings menu. Note that changing the Local Unit Role of a UTU causes the unit to reset and the LEDs to cycle.
•
Configure settings in the order of the following procedures. First configure the Global PTM Settings that follow. System Settings must then be configured before LTU and NTU1/NTU2 Interface settings are configured. Changing System Settings can clear values configured in LTU and NTU1/NTU2 Interface settings.
•
When the HDSL units are reset or cycle power, the date field is preserved but the time field is not preserved. Set the time using the Config Date and Time display. When the HDSL units are turned off and left off for more than 24 hours, set both the date and time using the Config Date and Time display since neither value was preserved.
Configure Basic Settings See the point-to-point configuration section to: •
configure terminal settings (page 20)
•
configure date and time (page 21)
•
change password (page 22)
•
configure circuit ID (page 22). Circuit wide PTM parameters cannot be set at the NTUs, they must be set at the LTU.
WorldDSL HDSL Line and Desktop Units
September 14, 2000
33
System Configuration
700-804-100-06, Revision 06
Configure PTM System Settings Use the System Settings menu to select and configure system-wide operating parameters. Configure system setting as follows: When changing application mode settings, the new interface defaults override existing values. It is recommended that you select the application prior to selecting the interface configuration (see “Configure LTU and NTU Interfaces” on page 26). The PTM mode can only be selected from an LTU or management unit.
1
Press S at the Config drop-down menu to display the System Settings menu. Figure 26 shows the System Settings menu for an LTU in the PTM Application Mode. Figure 27 shows the System Settings menu for a UTU or ETU in the PTM Application Mode.
Figure 26.
Figure 27. 34
LTU System Settings Menu - PTM Application Mode
UTU or ETU System Settings Menu - PTM Application Mode September 14, 2000
WorldDSL HDSL Line and Desktop Units
700-804-100-06, Revision 06
2
System Configuration
Do the following for each system option setting to be changed. Table 15 describes the fields displayed on the PTM System Settings menus. When using a UTU or ETU as an LTU, configure the Local Unit Role option first. •
Use the
←
•
Use the
SPACEBAR to toggle to the appropriate option or type in the correct information, then press to select the option.
ENTER
or the
→
key to select the sub-menu item to be changed.
Table 15.
PTM System Settings Options
Sub-menu Item and Options
Description
Application mode
See “Application Modes and Options” on page 83 for a detailed description of the application modes
PTM
Enables the system to transmit payloads to two separate NTUs using one HDSL pair for each NTU. For more information, see “Point-to-Multipoint Mode” on page 87.
PTM Time Slot Mapping BASIC Remote Power Feed mode NONE
Typically, select BASIC. The CUSTOM1 and CUSTOM2 time slot mapping is for OEM application only and is detailed in the ETSI OEM Module Specification, OEM-HMS-SW1-01. Not used in PTM Disables the remote power feed mode. The NTU must be locally powered.
Remote Console Access
Selects whether a maintenance terminal connected to an NTU can affect system changes or is read-only. This field may be set only at the LTU:
ALLOWED
NTU Console screens can be used to configure the system.
BLOCKED
NTU Console screens are read-only. The LOC and REM pushbuttons on the NTU are also disabled. System changes can only be made from the LTU.
Local Unit Role (for UTU only)
Configures UTU as LTU (master) or NTU (slave). The default configuration for the UTU is NTU (slave). Changing the Local Unit Role of a UTU causes the unit to reset and the LEDs to cycle.
LTU
Configures UTU as LTU (master). The LTU-configured UTU does not provide line power to other HDSL units.
NTU
Configures UTU as NTU (slave). The NTU-configured UTU cannot receive power from another UTU; it can, however, receive power from an LTU-804.
Configure PTM LTU and NTU Interfaces Select and configure the LTU and NTU specific operating parameters using the Config LTU, NTU1 and NTU2 Interface menus. When changing application mode settings, the new interface defaults override existing values. It is recommended that you select the application prior to selecting the interface configuration.
1
Press one of the following keys at the Config menu to display the LTU, NTU1, or NTU2 Interface menu: •
L
for the LTU Interface menu
•
N
for the NTU1 Interface menu
•
U
for the NTU2 Interface menu
Figure 28 on page 36 shows the LTU Interface menu for the PTM mode. Figure 29 on page 36 shows the NTU2 Interface menu for the PTM mode. The NTU2 Interface menu is the same as the NTU1 Interface menu.
WorldDSL HDSL Line and Desktop Units
September 14, 2000
35
System Configuration
700-804-100-06, Revision 06
Figure 28.
Figure 29. 2
Config LTU Interface Menu - PTM Mode
Config NTU2 Interface Menu - PTM Mode
Do the following for each interface option to be changed. Table 16 on page 37 describes the fields displayed on the LTU, NTU1, and NTU2 Interface menus for the PTM mode. •
Use the
←
•
Use the
SPACEBAR to toggle to the appropriate option or type in the correct information, then press to select the option.
ENTER
or the
→
key to select the sub-menu item to be changed.
There is a known problem with certain idle codes inserted incorrectly into Time slot 31 (last channel in the G.704 frame). Use only the following idle codes: • 0xFF (all ones) for AIS or channel filler • 0xD5 analog idle for A-law PCM • 0x7E idle code for High-level Data Link Control (HDLC) digital channels
36
September 14, 2000
WorldDSL HDSL Line and Desktop Units
700-804-100-06, Revision 06
System Configuration
Table 16.
LTU and NTU Interface Menus - PTM Mode
Field
Description
Primary Timing Source:
Selects the source of clock for the HDSL transmit direction. The choices are: G.703 - Input E1 clock INT - Internal Oscillator Nx64k - Nx64k Serial Data port receive clock (TT) HDSL - Recovered clock from received HDSL data EXT - External 2.048 MHz clock If time slots are assigned to G.703, the only allowed options are G.703 and EXT.
G.703 Port Idle Code
User inputs the idle pattern (from 00 to FF) transmitted in unused time slots from the LTU or NTU G.703/704 port.
Data Rate/# of TSs
To specify the bandwidth transmitted to or from the LTU/NTU G.703 port, the user inputs either: the data rate from 64 to 1920 kbps (for example, 64 or 256 or 1920) number of DS0 time slots up to 30 (for example, 1 or 4 or 30) When either value is entered, the other value automatically displays after pressing ENTER .
Beginning TS
The user inputs the number of the beginning time slot in the E1 frame transmitted from the LTU or NTU G.703 port. Options are 1-15 and 17-31.
Nx64k Port Interface Type
Select the interface standard for serial data port. The options are: V.35, V.36, X.21, and RS-530. See Table 17 on page 38 for details about the interface types.
Data Rate/# of TSs
To specify the bandwidth transmitted to or from the LTU/NTU Nx64k serial data port, the user inputs either: the data rate from 64 to 2048 kbps (for example, 64 or 256 or 2048) number of DS0 time slots up to 32 (for example, 1 or 4 or 32) When either value is entered, the other value automatically displays after pressing ENTER . Note that the data rate of 2048 applies to unstructured mode.
Beginning TS
In structured application mode, selects the number of the beginning time slot of the E1 frame from which serial data at Nx64k port is inserted or extracted. Options are 1-15, and 17-31. In unstructured mode, beginning TS is always 0.
Transmit Clock
Selects the transmit data (SD) clock as External (EXT), Internal Rising Edge (INT_RISING), or Internal Falling Edge (INT_FALLING). Transmit clock is always EXT if the Timing Source is Nx64k. See “System Timing Circuits” on page 80.
CTS DSR RLSD
Specifies one of three methods the LTU/NTU uses to generate the CTS, DSR, and RLSD control signals for the V.35/V36 port. The V.35/V.36 port is hardware-configured as DCE. Set each of these parameters to match the requirements of the application. The choices are: • STD (standard) - The output control signal follows the ITU standards • ON (force ON) - Control signal is always ON • OFF (force OFF) - Control signal is always OFF
LL/RL
Selects whether the LTU/NTU responds to (enabled) or ignores (disabled) the Local Loopback (LL) and Remote Loopback (RL) input control signals. When enabled (ENA), the status of local and remote loopbacks appears on the Test screen.
WorldDSL HDSL Line and Desktop Units
September 14, 2000
37
System Configuration
700-804-100-06, Revision 06
Table 17 describes the operation of the V.35/V.36/X.21 output control signals. Table 17. State
V.35/V.36/X.21 Output Control Signal Operation
Condition
Control Signals
Output Data (a)
1
HDSL link down
CTS = OFF DSR = DTR RLSD = OFF TM = OFF
RD = all ones
2
HDSL link up
CTS = RTS(a) DSR = DTR(a) RLSD = ON TM = OFF
RD = normal data
3
Self-test or remote unit issued a loopback away from local unit
CTS = (link) DSR = OFF RLSD = (link) TM = ON
RD = (link)
4
Local unit issued any loopback
CTS = (link) DSR = ON RLSD = (link) TM = ON
RD = looped data
(a) DTR and RTS are inputs received from the customer’s DTE. RSLD performs as defined in states 1 and 2: its state is determined by the HDSL link being up or down.
Configure PTM Alarms Use the Configure Alarms menu to configure LTU and NTU Interface alarm parameters and the HDSL span alarm parameters. When setting alarm parameters for LTUs and NTUs, keep the following rules in mind: •
Disabled alarms do not cause LED indications and are not stored in history. Console screen menu alarm history reports are not generated.
•
Minor alarms cause LED indications and are stored in history. Console screen menu alarm history reports are generated.
•
Major alarms cause LED indications, actuate the line unit alarm relay, and are stored in history. Console screen menu alarm history reports are generated.
•
Protection switch alarms are equivalent to Major alarms. They cause LED indications, actuate the line unit alarm relay, cause the G.703 data to be switched to the protection (backup) circuit, and are stored in history.
•
The LTU alarm relay activates in response to a major alarm at the LTU only.
•
The NTU alarm relay activates in response to a major alarm at the NTU only.
•
For the duration of a major alarm, the line unit alarm relay contacts are connected as follows: –
The C (Common) contact is connected to the NO (Normally Open) contact.
–
The NC (Normally Closed) contact is floating.
•
With no alarm, the C and NC contacts are connected, and the NO contact remains floating.
•
The line unit alarm relay operates in a fail-safe mode. When no power is applied to the line unit, the alarm relay C and NO contacts are connected with the NC contact floating.
Press
38
A
at the Config menu to display the Alarms menu for the PTM mode (see Figure 30 on page 39).
September 14, 2000
WorldDSL HDSL Line and Desktop Units
700-804-100-06, Revision 06
System Configuration
Figure 30.
Config Alarms Menu - PTM Mode
PTM Alarms for LTU and NTU Interface 1
Press one of the following keys at the Config menu to display the Alarms LTU, Alarms NTU1, or Alarms NTU2 Interface menu: •
L
for the Alarms LTU Interface menu
•
N
for the Alarms NTU1 Interface menu
•
U
for the Alarms NTU2 Interface menu
Figure 31 shows the Alarms NTU2 Interface menu for the PTM mode. The Alarms Interface menus for the LTU and NTU1 are the same.
Figure 31.
WorldDSL HDSL Line and Desktop Units
Config Alarms NTU2 Interface Menu - PTM Mode
September 14, 2000
39
System Configuration
2
700-804-100-06, Revision 06
Do the following for each interface option to be changed. Table 18 describes the fields displayed on the Alarms LTU, Alarms NTU1, and Alarms NTU2 Interface menus. •
Use the
←
•
Use the
SPACEBAR to toggle to the appropriate option or type in the correct information, then press to select the option.
ENTER
or the
→
key to select the sub-menu item to be changed.
Table 18.
PTM Alarms LTU and NTU1, NTU2 Interface Menu
Field
Description
Loss of Signal (LOS)
Selects whether the alarm is disabled (DIS), or enabled and reported as a Minor (MIN) or Major (MAJ) alarm when the LOS condition occurs.
Loss of Frame Align (LFA)
Selects whether the alarm is disabled (DIS), or enabled and reported as a Minor (MIN) or Major (MAJ) alarm when the LFA condition occurs.
Receive Alarm Indication Signal (AIS)
Selects whether the alarm is disabled (DIS), or enabled and reported as a Minor (MIN) or Major (MAJ) alarm when the AIS condition occurs.
Remote Alarm Indication Signal (RAI)
Selects whether the alarm is disabled (DIS), or enabled and reported as a Minor (MIN) or Major (MAJ) alarm when the RAI condition occurs.
Loss of Clock (LOC)
If time slots are mapped to the Nx64k interface, selects whether the alarm is disabled (DIS), or enabled and reported as a Minor (MIN) or Major (MAJ) alarm when the LOC condition occurs following a loss of the DTE transmit clock (TT).
Loss of Clock (LOC)
Selects whether the alarm is disabled (DIS), or enabled and reported as a Minor (MIN) or Major (MAJ) alarm when the LOC condition occurs following a loss of the external clock.
PTM HDSL Span Alarms 1
Press
1
at the Config menu to display the Alarms HDSL Span 1 menu (Figure 32).
Figure 32. 2
Do the following for each interface option to be changed. Table 19 on page 41 describes the fields displayed on the Alarms HDSL Span 1 menu. •
Use the
←
•
Use the
SPACEBAR to toggle to the appropriate option or type in the correct information, then press to select the option.
ENTER
40
Config Alarms HDSL Span 1 Menu - PTM Mode
or the
→
key to select the submenu item to be changed.
September 14, 2000
WorldDSL HDSL Line and Desktop Units
700-804-100-06, Revision 06
System Configuration
Table 19.
Alarms HDSL Span 1 Menu
Field
Description
Loops
Selects the loop for which the alarm parameters are specified (BOTH, LOOP1, or LOOP2)
Margin (MAR)
Selects whether the alarm is disabled (DIS), or enabled and reported as a Minor (MIN) or Major (MAJ) Alarm when the margin falls below the threshold. This indicates a potential degradation of line quality. If an alarm is configured as a protection switch (PSW), it will behave as a Major (MAJ) Alarm, and cause protection switching to engage.
Margin Threshold
Selects the margin alarm threshold (from 0 dB to 15 dB) for all four span margin measurements.
Errored Seconds (ES)
Selects whether the alarm is disabled (DIS), or enabled and reported as a Minor (MIN) or Major (MAJ) Alarm when 24-hour ES count exceeds the threshold.
24 Hr. ES Threshold
Selects the errored seconds threshold (0 to 255) for all four errored seconds measurements of the span measured over a 24-hour period.
Loss of Sync Word (LOSW)
Selects whether the alarm is disabled (DIS), or enabled and reported as a Minor (MIN) or Major (MAJ) Alarm when the LOSW condition (HDSL loop down) occurs.
Power Feed Open (PFO)
Selects whether the alarm is disabled (DIS), or enabled and reported as a Minor (MIN) or Major (MAJ) Alarm when the PFO condition occurs.
Power Feed Short (PFS)
Selects whether the alarm is disabled (DIS) or enabled and reported as a Minor (MIN) or Major (MAJ) Alarm when the PFS condition occurs.
SET TO FACTORY DEFAULTS Set to Factory Dflts is the screen from which all operating options can be reset to their factory defaults. The table lists default values for both point-to-point and PTM modes. 1
Press
F
at the Config menu to display the Set to Factory Dflts screen (Figure 33).
Figure 33. Set to Factory Defaults Screen 2
Press
ENTER
to reset value to factory defaults. A message appears at the bottom of the display:
SETTING FACTORY DEFAULTS ... SERVICE *WILL* BE INTERRUPTED! ARE YOU SURE(Y/N)?
3
Do one of the following: •
Press
•
Press Y to reset values to factory defaults. The system resets and both LTU and NTU units go through their respective synchronization processes. If loops are down or are in update mode while Set to Factory Dflts is enabled, only the local unit will restart. If the loops are up, both the LTU and NTU will restart.
N
to keep the current settings.
WorldDSL HDSL Line and Desktop Units
September 14, 2000
41
System Configuration
700-804-100-06, Revision 06
The factory default system settings are listed in Table 20. Table 20.
Factory Default System Settings
Operating Option
Default Setting System Settings
Application mode
UNSTRUCT (Unstructured)
PTM Time Slot Mapping
BASIC
Remote Power Feed mode
POWER
Remote Power Feed Loop
BOTH
UTU Local Unit Role (UTU or ETU only)
NTU
LTU/NTU Interface G.703 port CRC-4 mode
DIS (Disable)
Idle Code
FF
Data Rate/# of TSs
2048 kbps/32
Beginning TS
0
AIS (STRUCT mode only)
FULL
Nx64k port Interface Type
V.36
Data Rate/# of TSs
0
Beginning TS
0
Transmit Clock
INT-RISING (Internal Rising)
CTS
STD (Standard)
DSR
STD (Standard)
RLSD
STD (Standard)
LL/RR
ENA (Enabled)
Alarms LTU/NTU Interface Loss of Signal (LOS)
MIN (Minor)
Loss of Frame Alignment (LFA)
MIN (Minor)
Received Alarm Indication Signal (AIS)
MIN (Minor)
Remote Alarm Indication (RAI)
MIN (Minor)
Loss of Clock (LOC)
MIN (Minor)
Alarms HDSL Spans Loops
BOTH
Margin (MAR)
MIN (Minor)
Margin Threshold
6
Errored Seconds (ES)
MIN (Minor)
24Hr ES Threshold
70
Loss of Sync Word (LOSW)
MAJ (Major)
Power Feed Open (PFO)
MIN (Minor)
Power Feed Short (PFS)
MIN (Minor)
LOGGING OFF Log off by choosing Quit from the menu bar or by disconnecting the cable connecting the maintenance terminal to the line unit. The system will automatically log off after 20 minutes of keyboard inactivity.
42
September 14, 2000
WorldDSL HDSL Line and Desktop Units
700-804-100-06, Revision 06
Monitoring System Activity and Performance
MONITORING SYSTEM ACTIVITY AND PERFORMANCE The following sections describe the screens that display the status of system activity and performance as well as basic system information. These screens show current alarm status, performance history, product, and configuration information. View these screens using a maintenance terminal or PC running a terminal emulation program connected to the V.24 (RS-232) Console port. See page 12 for instructions on connecting a maintenance terminal or PC.
MAIN CONSOLE SCREEN The Main Console screen displays a summary of LTU/NTU/doubler circuit configuration, performance statistics, and alarm status for each interface in the circuit. Press M at the Console screen to display the Main menu. Figure 34 shows the LTU and an NTU in a point-to-point application. The numbered fields are described in Table 21 on page 44. Other information displayed on the Main Console screen is described in Table 22 on page 45.
1
Figure 34.
2
3
4
Main Console Screen - LTU and NTU in Point-to-Point Application
WorldDSL HDSL Line and Desktop Units
September 14, 2000
43
Monitoring System Activity and Performance
700-804-100-06, Revision 06
Figure 35 shows a point-to-point application using the EDU-840 doubler. Figure 36 shows an LTU and two NTUs (NTU1 and NTU2) in a PTM application. The numbered fields are described in Table 21. Other information displayed on the Main Console screen is described in Table 22 on page 45.
5
Figure 35.
Main Console Screen - LTU, NTU, and Doubler in Point-to-Point Application
Figure 36.
Main Console Screen - LTU and Two NTUs in Point-to-Multipoint Application
Table 21. Reading the Main Console Screen Item
44
Description
1
Shows performance and alarms for the LTU user interface.
2
Shows performance and alarms for the LTU HDSL interface.
3
Shows performance and alarms for the NTU HDSL interface.
4
Shows performance and alarms for the NTU user interface.
5
Shows performance for the Span 1 and Span 2 HDSL interfaces at the EDU. September 14, 2000
WorldDSL HDSL Line and Desktop Units
700-804-100-06, Revision 06
Monitoring System Activity and Performance
Table 22. Field
Fields Displayed in Main Console Screens
Description Circuit Configuration
G.703/Nx64k
Identifies the type of port.
n TS
Indicates the number of E1 time slots (n) mapped to the application interface.
nk
Indicates the data rate (n) mapped to the Nx64k interface.
RPF
Indicates source of remote power feed.
Timing
Indicates the primary source the LTU/NTU uses for clock synchronization:
INT
Internal oscillator.
EXT
External 2.048 MHz.
G.703
G.703 receive data.
Nx64k
Serial data port receive clock.
HDSL
Recovered clock from received HDSL data.
Application mode
Indicates which application mode is in effect: structured (STRUCT), unstructured (UNSTRUCT), Point-to-Multipoint (PTM), Time Slot Prioritization (TSP), or Single Pair (SINGLE). Performance
MAR1
Displays the Margin value for each HDSL Loop1 interface or displays link status (SIG, ACK, etc.) if the link is not up.
MAR2
Displays the Margin value for each HDSL Loop2 interface or displays link status (SIG, ACK, etc.) if the link is not up.
ES1
Displays the errored second counts for the LTU/NTU G.703 ports and all HDSL Loop1 interfaces. The counts are for the latest 24-hour period, calculated as the sum of the counts in the previous 95 15-minute intervals, plus the count in the current 15-minute interval.
ES2
Displays the errored second counts for all HDSL Loop 2 interfaces, calculated the same as for ES1. Alarms The Alarms field displays a list of all active alarms at each LTU/NTU and HDSL span interface.
Possible G.703 alarms LOS
Loss of signal at the G.703 input.
LFA
Loss of frame alignment at the G.703 input (structured application mode only). In CRC-4 enabled mode, also indicates loss of CRC-4 multiframe.
AIS
Alarm indication signal (unframed all ones) received at the G.703 input.
RAI
Remote alarm indication signal received at the G.703 input (via A-bit). Only available in structured application mode.
Possible Nx64k port alarms LOC
Loss of incoming clock (TT) at the serial data port (only enabled if the primary timing source is Nx64k or if the transmit clock mode is set to EXT).
Possible External Clock Alarms LOC
Applies to loss of external clock when EXT timing is used. The external clock was lost for the previous second. This alarm is reset when the clock is active again. Continued
WorldDSL HDSL Line and Desktop Units
September 14, 2000
45
Monitoring System Activity and Performance
Table 22. Field
700-804-100-06, Revision 06
Fields Displayed in Main Console Screens (Cont.)
Description Possible HDSL alarms
MAR1, MAR2, MAR
(a)
Margin threshold has fallen below alarm threshold for HDSL1, HDSL2, or both, respectively.
ES1, ES2, ES(a) LOSW1, LOSW2, LOSW
Errored second count has exceeded alarm threshold for HDSL1, HDSL2, or both, respectively. (a)
Loss of sync word for HDSL1, HDSL2, or both, respectively. Remains active during restart, but not a cold start.
PFO1, PFO2, PFO(a)
Power feed open for HDSL1, HDSL2, or both, respectively. Remains active until power is successfully fed to remote unit, or remote power feeding is disabled.
PFS1, PFS2, PFS(a)
Power feed short for HDSL1, HDSL2, or both, respectively. Remains active until power is successfully fed to remote unit, or remote power feeding is disabled.
NOPSW
Protection circuit (backup) is not available.
(a) Indicates alarm conditions on both loops.
MONITOR MENU The Monitor menu contains the following options: •
LTU Interface Screen that displays signal activity at the LTU G.703 and/or Nx64k serial data port.
•
NTU Interface Screen that displays signal activity at the NTU G.703 and/or Nx64k serial data port.
•
HDSL Span 1 through 3 that displays 24-hour error counts and other information for the HDSL span 1 through HDSL span 3 interfaces.
Press 0 at the Console screen to display the Monitor menu. Figure 37 shows the Monitor menu for a point-to-point application. Figure 38 on page 47 shows the Monitor menu for a point-to-point application with a doubler. Figure 39 on page 47 shows the Monitor menu for a point-to-multipoint application.
Figure 37. 46
Monitor Menu - Point-to-Point Application September 14, 2000
WorldDSL HDSL Line and Desktop Units
700-804-100-06, Revision 06
Monitoring System Activity and Performance
Figure 38.
Monitor Menu - Point-to-Point Application With Doubler
Figure 39.
WorldDSL HDSL Line and Desktop Units
Monitor Menu - Point-to-Multipoint Application
September 14, 2000
47
Monitoring System Activity and Performance
700-804-100-06, Revision 06
Monitor LTU Interface Screen The Monitor LTU Interface screen permits: •
viewing of 24-hour error counts for the LTU G.703 port
•
viewing of signaling activity at the LTU Nx64k serial data port
•
clearing the 24-hour history counters All elements on the Monitor LTU Interface screen are displayed, but may not be valid if the application port has no time slots allocated.
At the Monitor menu, press LTU Interface screen.
L
Figure 40.
48
to select Monitor LTU Interface screen. Figure 40 shows a point-to-point Monitor
Monitor LTU Interface Screen - Point-to-Point Application
September 14, 2000
WorldDSL HDSL Line and Desktop Units
700-804-100-06, Revision 06
Monitoring System Activity and Performance
Table 23 describes the fields displayed on the Monitor LTU and NTU Interface screens. Table 23. Field
Fields Displayed in Monitor LTU and NTU Interface Screens Description G.703 Port
Errored Seconds (ES) 24Hour Count
The number of one second intervals in which at least one bipolar violation (BPV) or one CRC-4 error was detected at the G.703 input port during the last 24 hours.
Severely Errored Seconds (SES) 24 Hour Count
The number of one second intervals during which a Loss of Signal (LOS), an Alarm Indication Signal (AIS), or a Loss of Frame (or CRC-4 Multiframe) Alignment (LFA) occurred at the incoming port.
Unavailable Seconds (UAS) 24 Hour Count
The number of seconds that G.703 input signals were unavailable during the last 24 hours. After ten consecutive SESs, the system is deemed unavailable, and the current UAS counter begins counting from ten. After ten consecutive non-SESs, the system returns to availability, and the ten counts representing the non-SESs are removed from the UAS counter.
CRC-4 Errored Seconds (Cumulative)
The number of CRC-4 errors that were detected at the G.703 port since error counters were last cleared. Turning CRC-4 mode on and off clears the CRC-4 error counter.
Bipolar Violation Seconds (Cumulative)
The number of seconds in which bipolar violations were detected at the G.703 port since error counters were last cleared.
Clear 24-Hour History
The date and time that the 24-hour histories were last cleared are displayed here. Enable this function by pressing L or ENTER to clear all 24-hour history counters (including HDSL). This action must be confirmed by pressing Y . Nx64k Port
Data & Clk Activity
Displays the status of the data and clock signals at the Nx64k port at one-second intervals Asterisks (**) indicate an active line. Dashes (--) indicate an inactive line. Displayed fields are: From DTE From DCE ST RT RD TT SD -- -** ** - -
Ctrl Signal State
Displays the status of the control signals at the Nx64k port at one-second intervals ON indicates an active line. OFF indicates an inactive line. Displayed fields are: From DTE From DCE CTS DSR RLSD TM RTS DTR RL LL OFF OFF OFF OFF OFF OFF ON OFF
Clear 24-Hour History
The date and time that the 24-hour histories were last cleared are displayed here. Enable this function by pressing L or ENTER to clear all 24-hour history counters (including HDSL). This action must be confirmed by pressing Y .
WorldDSL HDSL Line and Desktop Units
September 14, 2000
49
Monitoring System Activity and Performance
700-804-100-06, Revision 06
Monitor NTU Interface Screen The parameters displayed on the Monitor NTU Interface screen are identical to those displayed on the Monitor LTU Interface screen (described in the previous section). The Monitor NTU Interface screen permits: •
viewing of 24-hour error counts for the NTU G.703 port
•
viewing of signaling activity at the NTU Nx64k serial data port
•
clearing the 24-hour history counters If no time slots are mapped to a port, the statistics are not updated.
At the Monitor menu, press N to select the Monitor NTU Interface screen. Figure 41 shows a point-to-point NTU Interface screen. Table 23 on page 49 describes the fields displayed on the Monitor NTU Interface screen.
Figure 41.
50
Monitor LTU Interface Screen - Point-to-Point Application
September 14, 2000
WorldDSL HDSL Line and Desktop Units
700-804-100-06, Revision 06
Monitoring System Activity and Performance
Monitor HDSL Span Screen Each Monitor HDSL Span screen permits viewing of the 24-hour error counts for each HDSL span in the circuit. A span is defined as the link between two HDSL units (LTU and NTU, LTU and doubler, doubler and NTU) and is comprised of two loops (that is, two twisted copper pairs). A three-unit HDSL system (LTU, doubler, NTU) has two spans that can be monitored independently for accurate fault isolation. At the Monitor menu, press 1 to select the Monitor HDSL Span 1 screen. Figure 42 shows loops 1 and 2 of Span 1 (from LTU to NTU) in a point-to-point application with no doubler. The values under the LTU-1 column represent HDSL Loop1 as measured by the LTU. The values under the NTU-1 column represent HDSL Loop1 as measured by the NTU. This arrangement is repeated for Loop2 using the LTU-2 and NTU-2 columns. Table 24 on page 52 describes the fields displayed.
Figure 42.
Monitor HDSL Span 1 Screen - Point-to-Point Application with No Doubler
Press 2 to select the Monitor HDSL Span 2 screen. Figure 43 shows loops 1 and 2 of Span 2 (EDU1-1 to NTU-1 and EDU1-2 to NTU-2) in an application with one doubler. Table 24 on page 52 describes the fields displayed.
Figure 43.
Monitor HDSL Span 2 Screen - Point-to-Point Application with One Doubler
WorldDSL HDSL Line and Desktop Units
September 14, 2000
51
Monitoring System Activity and Performance
700-804-100-06, Revision 06
At the Monitor screen, press 1 to select the Monitor HDSL Span 1 screen. Figure 44 shows a point-to-multipoint application. The values under the LTU-1 column represent HDSL Loop1 as measured by the LTU. The values under the NTU1-1 column represent HDSL Loop1 as measured by the NTU1. This arrangement is repeated for Loop2 using the LTU-2 and NTU2-1 columns. Table 24 describes the fields displayed.
Figure 44.
Monitor HDSL Span 1 Screen - Point-to-Multipoint Application
Table 24.
Fields Displayed in Monitor HDSL Span Screens
Field
Description
Current Margin (dB) (MAR)
Indicates the excess signal-to-noise ratio relative to a 10-7 bit error rate. The normal range of a typical margin is from 6 to 22 dB, with a value of 6 dB corresponding to a predicted BER of 10-10.
Low Margin (dB)
Indicates the lowest margin since startup or the last 24-hour history clear.
High Margin (dB)
Indicates the highest margin since startup or the last 24-hour history clear.
Pulse Attenuation (dB)
Indicates the attenuation of the 2B1Q pulse from the distant end. This value is related to the cable pair’s loss at 292 KHz. The normal range of pulse attenuation is from 1 to 32 dB.
Errored Seconds (ES)
The number of one-second intervals in which at least one HDSL CRC-6 error or loss of Sync Word (LOSW) was detected on the HDSL span during the last 24 hours.
Unavailable Seconds (UAS)
The number of seconds that the HDSL span was down during the last 24 hours.
Pair Exchange
Indicates whether the HDSL pairs carrying the traffic are correctly connected or have been interchanged. The system automatically compensates for an interchange of pairs.
Loop1 Tip/Ring Reversal
Indicates whether the two conductors of HDSL Loop1 are correctly connected or have been interchanged. The system automatically compensates for an interchange of wire leads.
Loop2 Tip/Ring Reversal
Indicates whether the two conductors of HDSL Loop2 are correctly connected or have been interchanged by error. The system automatically compensates for an interchange of wire leads.
Clear 24-Hour History
Clears all 24-hour history counters (including G.703 values) and displays the date and time the error counters were last cleared.
52
September 14, 2000
WorldDSL HDSL Line and Desktop Units
700-804-100-06, Revision 06
Monitoring System Activity and Performance
HISTORY MENU The History menu contains the following status screens: •
LTU and NTU Interface screens that display 24-hour, 7-day, and alarm performance history
•
HDSL Span screens that display 24-hour, 7-day, and alarm performance history for each HDSL span in the network
The History menu also provides the option to clear the 24-hour, 7-day, and alarm history screens. This option is described in “Clear History Screens” on page 61. Press H to select the History menu. Figure 45 shows the History menu for a point-to-point application with no doubler. Figure 46 shows the History menu for a point-to-point application with one doubler. Figure 47 on page 54 shows the History menu for a point-to-multipoint application.
Figure 45.
History Menu - Point-to-Point Application with No Doubler
Figure 46.
History Menu - Point-to-Point Application with One Doubler
WorldDSL HDSL Line and Desktop Units
September 14, 2000
53
Monitoring System Activity and Performance
700-804-100-06, Revision 06
Figure 47.
History Menu - Point-to-Multipoint Application
History LTU and History NTU Interface Menus The History LTU and History NTU Interface menus provide three status-viewing options: •
24-Hour History
•
7-Day History
•
Alarm History
At the History menu, either press L to select the History LTU Interface menu (Figure 48) or press N to select the History NTU Interface menu (Figure 49 on page 55). In the point-to multipoint mode, pressing N selects the History NTU1 Interface menu and pressing U selects the History NTU2 Interface menu.
Figure 48.
54
History LTU Interface Menu
September 14, 2000
WorldDSL HDSL Line and Desktop Units
700-804-100-06, Revision 06
???
Figure 49. History NTU Interface Menu
LTU and NTU Interface 24-Hour History Screens The LTU and NTU Interface 24-Hour History consists of six status screens, each showing sixteen 15-minute intervals (4 hours) of performance history. The 24-Hour History screens have two columns of data showing from left to right: •
The starting time of each 15-minute interval.
•
The number of ES/UAS for the LTU and NTU G.703 input for each interval. A dash (-) represents a count of zero. No ES/UAS are maintained for Nx64k ports.
The performance history information displayed for the NTU interface in the same as that for the LTU interface. At the History menu, press
H
to select a 24-Hour History status screen (Figure 50).
Figure 50.
WorldDSL HDSL Line and Desktop Units
24-Hour History Screen - LTU Interface Shown
September 14, 2000
55
700-804-100-06, Revision 06
Press CTRL + R or CTRL + C to display the previous or next screen in the sequence, respectively. Press the the → key to scroll the screen up or down by one line, respectively.
←
or
LTU and NTU Interface 7-Day History Screen The LTU and NTU Interface 7-Day History screens have two columns of data that show (from left to right) the: •
Date of each complete day within the 7-day interval.
•
Number of ES/UAS for the LTU and NTU G.703 input for each interval. A dash (-) represents a count of zero. No ES/UAS are maintained for Nx64k ports.
The performance history information displayed for the NTU interface in the same as that for the LTU interface. At the History menu, press
D
to select the 7-Day History status screen (Figure 51).
Figure 51.
7-Day History Screen - LTU Interface Shown
LTU and NTU Interface Alarm History Screen At the History menu, press A to select the Alarm History status screen (Figure 52). Table 25 and Table 26 on page 57 describe the alarm history data contained in the LTU and NTU Interface Alarm History status screens.
56
September 14, 2000
WorldDSL HDSL Line and Desktop Units
700-804-100-06, Revision 06
Figure 52.
Alarm History Screen - LTU Interface Shown
Table 25. Alarm History Data Column
Description
Alarm
Type of alarm.
First
Date and time the alarm first occurred.
Last
Date and time the alarm last occurred.
Count
Number of times the alarm has occurred since the alarms were last cleared.
If no alarm has occurred since the last alarms were cleared, the message No Alarms Reported is displayed on the appropriate line for each alarm. These alarms signal the conditions listed in Table 26. Table 26.
G.703 and Nx64k Alarm Parameters
G.703 Alarms LOS
Loss of Signal
LFA
Loss of Frame Alignment
AIS
Alarm Indication Signal
RAI
Remote Alarm Indication
Nx64k or External Clock Alarms LOC
Loss of Clock
Protection switch NOPSW
No Protection switch
History HDSL Span Menus The History HDSL Span menus provide three status-viewing options for HDSL Spans 1 through 3: •
24-Hour History
•
7-Day History
WorldDSL HDSL Line and Desktop Units
September 14, 2000
57
700-804-100-06, Revision 06
•
Alarm History
At the History menu, press 1 to select the HDSL Span 1 menu. Press 2 to select the HDSL Span 2 menu or 3 to select the HDSL Span 3 menu. (The Span 2 menu is available with one doubler in the network and the Span 3 menu is available with two doublers.) Figure 53 shows the History HDSL Span 1 menu.
Figure 53.
History HDSL Span 1 Menu
HDSL Span 24-Hour History Screen Press
H
to select the 24-Hour History status screen for HDSL Span 1 (Figure 54).
Figure 54. 24-Hour History Screen - HDSL Span 1 Each HDSL Span 24-Hour History screen contains five columns of data that show (from left to right) the:
58
September 14, 2000
WorldDSL HDSL Line and Desktop Units
700-804-100-06, Revision 06
•
Starting time of each 15-minute interval.
•
Number of ES/UAS at each end of Loop1 (LTU-1, NTU-1) of the HDSL span for each interval. A dash (-) represents a count of zero.
•
Number of ES/UAS at each end of Loop2 (LTU-2, NTU-2) of the HDSL span for each interval. A dash (-) represents a count of zero.
The entire display consists of six screens, each showing sixteen 15-minute intervals (4 hours) of performance history. Press CTRL + R or CTRL + C to display the previous or next screen in the sequence, respectively. Press the the → key to scroll the screen up or down by one line, respectively.
←
or
HDSL Span 7-Day History Screen Press
D
to select the 7-Day History status screen for HDSL Span 1 (Figure 55).
Figure 55.
7-Day History Screen - HDSL Span 1
Each HDSL Span 7-Day History screen contains five columns of data showing (from left to right) the: •
Date of each completed day within the 7-day interval.
•
Number of ES/UAS at each end of Loop1 (LTU-1, NTU-1) of the HDSL span for each interval. A dash (-) represents a count of zero.
•
Number of ES/UAS at each end of Loop2 (LTU-2, NTU-2) of the HDSL span for each interval. A dash (-) represents a count of zero.
WorldDSL HDSL Line and Desktop Units
September 14, 2000
59
700-804-100-06, Revision 06
HDSL Span Alarm History Screens Press
A
to select the Alarm History status screen for HDSL Span 1 (Figure 56).
Figure 56.
Alarm History Screen - HDSL Span 1
Table 27 describes the four columns of data contained in each HDSL Span Alarm History screen. Table 27.
HDSL Span Alarm History Data
Column
Description
Alarm
Type of alarm (MAR1/2, ES1/2, LOSW1/2, PFO1/2, PFS1/2).
First
Date and time the alarm first occurred.
Last
Date and time the alarm last occurred.
Count
Number of times the alarm has occurred since the alarms were last cleared.
If no alarm has occurred since the last alarms were cleared, the message No Alarms Reported displays on the appropriate line for each alarm.
60
September 14, 2000
WorldDSL HDSL Line and Desktop Units
700-804-100-06, Revision 06
Clear History Screens Use the following options to clear the 24 Hour, 7 Day, or Alarm History status screens: •
Clr 24-Hr Hist: clears all of the 24-hour history error counters
•
Clr 7-day Hist: clears all of the 7-day history error counters
•
Clr Alarm Hist: clears all alarm history logs
To clear the status screens: 1
Select the alarm history option to be cleared with the message displays:
↑
and
↓
keys, then press
ENTER .
The following
ALL (24-HOUR, or 7-day, or ALARM) HISTORIES WILL BE CLEARED. CONTINUE (Y/N)? 2
Do one of the following: •
Press
N
to cancel the operation.
•
Press
Y
to clear the screen. Typing
Y
displays the following message:
24-HOUR HISTORIES CLEARED
INVENTORY SCREEN The Inventory screen permits tracking of the system's inventory, service, and revision state. Table 28 on page 63 describes the fields displayed in each Inventory screen. Press I to display the Inventory screen. Figure 57 shows an Inventory screen for a point-to-point application.
Figure 57.
WorldDSL HDSL Line and Desktop Units
Inventory Screen - Point-to-Point Application
September 14, 2000
61
700-804-100-06, Revision 06
Figure 58 shows an Inventory screen for a point-to-point application using a doubler. Table 28 on page 63 describes the fields displayed in each Inventory screen.
Figure 58.
Inventory Screen - Point-to-Point Application Using a Doubler
Figure 59 shows an Inventory screen for Loop 2 of a point-to-multipoint application., which includes the inventory for the LTU and NTU2. The Inventory screen for Loop 1 and NTU1 is similar. Table 28 on page 63 describes the fields displayed in each Inventory screen.
Figure 59.
62
Inventory Screen - Loop 2 of Point-to-Multipoint Application
September 14, 2000
WorldDSL HDSL Line and Desktop Units
700-804-100-06, Revision 06
Table 28.
Inventory Screen Data
Field
Description
Network Diagram
Displays the configuration of the LTU or NTU circuit.
Product
Displays the model numbers of the LTU, NTU, and any doubler units that comprise the channel.
List #
Displays the LTU, NTU, and doubler unit list numbers, which identify the particular unit versions.
H/W Cfg
Displays the LTU, NTU, and doubler unit hardware configuration level.
Serial #
Displays the unique serial number of the LTU, NTU and any doubler units for inventory and service tracking.
Manuf
Displays the date the LTU, NTU, and any doubler units were manufactured.
Days Op
Displays the number of days the LTU, NTU, and any doubler units have been in operation.
SW Part #
Displays the ADC part number of the firmware.
Chksum
Displays the checksum of the LTU, NTU, and doubler unit proms.
S/W Rev
Displays the currently installed firmware version level of the LTU, NTU and any doubler units.
SW Date
Displays the date that the firmware was released.
To View Loop1, Press 1 Displays the inventory information for NTU1 (Loop1) or NTU2 (Loop2) in PTM mode. To View Loop2, Press 2 (PTM mode - on LTU only)
WorldDSL HDSL Line and Desktop Units
September 14, 2000
63
Testing
700-804-100-06, Revision 06
TESTING This section provides information about loopback and Bit Error Rate (BER) testing. The Console screens for conducting these tests are described in “Loopback and BER Test Screens” on page 68.
LOOPBACKS An HDSL system provides several diagnostic loopbacks, both toward and away from the local unit, which can be used to verify proper transmission through the local unit, the HDSL lines, doubler units, and the remote unit. These loopbacks include configurations for point-to-point, point-to-multipoint, and doubler applications. Figure 60 on page 65 shows all possible loopback paths. The available loopbacks are listed in Table 29 on page 66. When loopbacks are activated the system generates an AIS past the loopback point toward the far unit. Loopbacks can be activated from: •
the LOC (local) and REM (remote) front-panel pushbuttons
•
the Local Loopback (LL) and Remote Loopback (RL) signals asserted by the local DTE
•
the Console screen Test screen
•
the management unit interface
Table 30 on page 67 lists loopback equivalents for different activation methods. Only one• loopback option can be enabled at a time. During a loopback, the Loopback LEDs on the front panel indicate the type of loopback in progress. See Table 4, “Front-Panel LED Indications,” on page 6. The system reverts to normal transmission of payload data after the specified timeout period has elapsed. If a timeout period is not specified, the loopback must be manually disengaged before normal transmission of data can resume. Test loopbacks disrupt the normal end-to-end transmission of customer data. Be sure you are authorized to bring an operational circuit out of service before engaging any loopbacks. The circuit does not revert to normal until loopbacks are disengaged manually or until after the specified loopback time-out period has expired. Testschleifenbetriebe (loopbacks) stören normale aufeinanderfolgende (end-to-end) Uebertragungen von Kundendaten. Bevor man irgendwelche Schleifenbetriebe aktiviert, stellen Sie sicher, dass nur autorisiertes Personal einen aktivierten Stromkreis ausschalten duerfen. Der Stromkreis kehrt nicht zum Normalbetrieb zurück, bis der Schleifenbetrieb manuell desaktiviert wurde oder bis die spezifizierte Ausschaltzeit vom Schleifenbetrieb abgelaufen ist.
64
September 14, 2000
WorldDSL HDSL Line and Desktop Units
700-804-100-06, Revision 06
Testing
NTU Interface
LTU Interface LTU HDSL
G.703
NTU HDSL
Loop 1
G.703
Two HDSL Pairs V.35
V.35
Loop 2
Point-to-Point Loopbacks
NTU Interface NTU HDSL
LTU Interface
G.703
Loop 1 Nx64
LTU HDSL
G.703
Single HDSL pair
NTU Interface Loop 2
V.35
NTU HDSL
G.703
Single HDSL pair V.35
Point-to-Multipoint Loopbacks
LTU Interface
NTU Interface
EDU-840 Doubler Loop 1
LTU HDSL
Loop 1
Two HDSL Pairs
Two HDSL Pairs
Loop 2
Loop 2
NTU HDSL
G.703
V.35
One-Doubler Loopback
LTU Interface
EDU-840 Doubler
EDU-840 Doubler
NTU Interface
Loop 1
Loop 1
Loop 1
Loop 2
Loop 2
Loop 2
NTU HDSL
G.703
LTU HDSL V.35
Two-Doubler Loopbacks
Customer Loopback
Figure 60.
Network Loopback
Point-to-Point, Point-to-Multipoint, and Doubler Loopback Paths
WorldDSL HDSL Line and Desktop Units
September 14, 2000
65
Testing
700-804-100-06, Revision 06
The first two loopbacks in Table 29 can be selected through the LOC and REM front-panel pushbuttons, the Console Test screen, the Local Loopback (LL)/Remote Loopback (RL) control lines, or the management unit interface. The remaining loopback options are available exclusively from the Console screens or management unit interface. Table 29.
Loopbacks Selected at Front Panel Pushbutons and Console Screens
Loopback
Description
LOC Pushbutton—Local HDSL Loopback
This is an analog loopback implemented in both HDSL transceivers, and enables a complete checkout of the local equipment by looping back data at the furthest point before the transmission media. The HDSL link goes down as a result of this loopback, and is therefore not selectable from the remote unit’s Console screens. The LL control line, when asserted from the local DTE, engages this loopback.
REM Pushbutton—Remote Loopback
Data is transmitted across the HDSL link and looped back at the remote interface ports. The HDSL link must be up for this loopback to be available. With no HDSL link up, the REM button will not enable any loopbacks. The RL control line, when asserted from the local DTE, engages this loopback.
Local Interface Loopback
Data is looped back at the closest point in the local unit toward customer equipment. This loopback is useful for verification of a proper connection at the local interface between your DTE and the local HDSL card. The HDSL link is maintained during this loopback.
Doubler (Span 1) Loopback
This is an analog loopback toward the LTU that is implemented in the EDU1 HDSL transceiver. This loopback verifies proper connection of Loop1 and Loop2 over Span 1 (between the LTU and EDU1).
Doubler (Span 2) Loopback
This is an analog loopback toward the EDU1 implemented in the EDU2 HDSL transceiver. This loopback verifies proper connection of Loop1 and Loop2 over Span 2 (between EDU1 and EDU2).
Point-to-Multipoint (PTM) Loopbacks
PTM loopbacks are run on either Loop1, Loop2, or both loops. Customer to LTU interface loopbacks are not supported. (For more information, see “Loopbacks” on page 64.)
Local or Interface Loopback Away from the Local Equipment
Data is looped back at the local unit or remote unit back toward the remote DTE equipment. This is equivalent to pressing the REM button on the remote unit’s front panel, and is made available at the local Console screen for ease of execution. The injected test data and loopback verification must still be performed at the remote unit site. Local equipment outputs an AIS for the duration of this test.
Remote interface Away from the Local Equipment
Data is looped back at the remote unit toward the remote DTE equipment. This is available at the local Console screen for the duration of this test. The injected test data and loopback verification must still be performed at the remote unit site. Local equipment outputs an AIS for the duration of this test.
The following applies to LTU and NTU loopbacks:
66
•
Loopbacks are available in all application modes.
•
No inband loopback codes are recognized or generated.
•
A remote HDSL loopback is not available from the local Console screen, since it causes the HDSL link to go down, and would require user action at the remote unit to disengage the loopback.
•
For Nx64k dataport applications, the DTE should supply timing for local interface loopbacks (internal timing supplied by the local unit may not function correctly).
•
G.703 and V.35 interface loopbacks occur at the same time. There is no independent control for either interface.
September 14, 2000
WorldDSL HDSL Line and Desktop Units
700-804-100-06, Revision 06
Testing
Table 30 summarizes the equivalent loopbacks for two different activation methods: •
LTU and NTU LOC and REM buttons
•
Console Test menus (see “Loopback and BER Test Screens” on page 68 for loopback operations from the Test menus). Table 30. Front Panel
Loopback Equivalents
Console Test Screen
Data Port Control Signals
Loopback mode
Loopback Position
LTU Nx64k port
NTU Nx64k port
LTU LOC button
NETWORK
LTU-HDSL
LL
LTU REM button
NETWORK
NTU-I/F
RL
NETWORK
LTU-I/F
NTU LOC button
CUSTOMER
NTU-HDSL
LL
NTU REM button
CUSTOMER
LTU-I/F
RL
CUSTOMER
NTU-I/F
BER TESTING The HDSL units provide a mechanism for validating circuit integrity utilizing a pseudorandom bit sequence (PRBS) generator and BER meter internal to the LTU unit. This diagnostic test disrupts the normal flow of payload traffic, and requires the presence of a Network NTU-I/F loopback or an external physical loopback at the NTU interface connector. The test is run at the full 2.048 Mbps rate, and must be run in Unstructured mode. BER results are accumulated continuously and updated on the Console screen at intervals of approximately 16 seconds (225 bits at 2.048 Mbps). The 215-1 PRBS data pattern is always generated at the LTU toward the HDSL channel, and the BER is always measured at the LTU based on data received from the HDSL channel. The test may be initiated and stopped from the Test screen at either the LTU or NTU Console screen. The BER test must be stopped before leaving the Test screen in order to restore normal payload transmission. Escaping while the BER test is in progress causes the following message to display: “BER Test in Progress. Must STOP before leaving screen.” Der BER-Test muß gestoppt werden bevor man das Testmenü verläßt, um somit normale Nutzlastenübertragung wiederherzustellen zu koennen. Wenn aber der BER-Test waehrend dem Betriebszustand verlassen wird, erscheint folgende Meldung: " BER Test laeuft noch. Bevor man es verlaesst muss es gestopt werden."
BER tests require a loopback (either metallic or NTU interface), and must be run in the UNSTRUCTURED application mode. BER-Tests benötigen einen "loopback" (entweder metallische oder NTU-Schnittstelle) und müssen in den UNSTRUKTURIERTEN Anwendungsmodus betrieben werden.
WorldDSL HDSL Line and Desktop Units
September 14, 2000
67
Testing
700-804-100-06, Revision 06
LOOPBACK AND BER TEST SCREENS From the main Console screen, press BER tests.
T
to display the Test screen from which you can set and run loopback and
Figure 61 shows the Test screen for a point-to-point application. Figure 62 is a Test screen for a point-to-point application using one doubler. Figure 63 on page 69 shows the Test screen for a point-to-point application using two doublers. Figure 66 on page 78 is a Test screen for a point-to-multipoint application. Table 31 on page 70 describes the Test screen loopback options and Table 32 describes the BER options.
Figure 61.
Test Screen for Point-to-Point Applications
The loopback remains active until the timeout elapses or the configuration changes. Loopback location and status are indicated by displaying the characters "@@]"on the network diagram. The position of the characters “[@@ or @@] indicates the direction of the loopback. If the characters are displayed in flashing reverse video, the loopback is active. If the characters are displayed in solid reverse video, the loopback is disabled.
68
September 14, 2000
WorldDSL HDSL Line and Desktop Units
700-804-100-06, Revision 06
Testing
Figure 62.
Test Screen for Point-to-Point Application Using One Doubler
Figure 63.
Test Screen for Point-to-Point Application Using Two Doublers
WorldDSL HDSL Line and Desktop Units
September 14, 2000
69
Testing
700-804-100-06, Revision 06
Figure 64.
Test Screen for Point-to-Multipoint Application
Table 31. Test Screen Loopback Options Option
Description
Lpbk Dir
Selects one of three loopback direction modes:
OFF
No loopbacks are active.
NETWORK
The loopback selected in Loopback Position is directed toward the network equipment connected to the LTU.
CUSTOMER
The loopback selected in Loopback Position is directed toward the customer's equipment connected to the NTU.
Lpbk Loop(s) BOTH
Both loops are used in the loopback test.
LOOP1
Only loop 1 is used in the loopback test.
LOOP2
Only loop 2 is used in the loopback test.
Lpbk Position
Selects one of five possible loopback positions:
LTU-I/F
The LTU application interface.
LTU-HDSL
The LTU HDSL ports (not available from the NTU Console screen).
EDU1
The HDSL transceiver of EDU1
EDU2
The HDSL transceiver of EDU2
NTU-HDSL
The NTU HDSL ports (not available from the LTU Console screen).
NTU-I/F
The NTU application interface.(In PTM mode, this loopback is not supported if both loops are selected for loopback.)
Lpbk Timeout
70
Selects the loops used in the loopback test:
Selects one of three loopback timeouts:
NONE
Disables automatic timeout cancellation of all loopbacks.
20
Automatically cancels any loopback 20 minutes after initiation.
120
Automatically cancels any loopback 120 minutes after initiation.
September 14, 2000
WorldDSL HDSL Line and Desktop Units
700-804-100-06, Revision 06
Testing
Table 32. Test Screen BER Options Option
Description
BER Test
Selects the state of the BER test.
STOP
Terminates the current test and resumes normal transmission of user payload. Prior BER tests are maintained for reference on the screen. STOP must be selected to terminate the BER test prior to exiting the screen.
RESTART
Begins BER test. This disrupts user payload traffic and inserts a pseudo-random bit sequence (PRBS) at the LTU toward the NTU. The actual pattern used is a 2e15 pattern as defined by reselecting this option (pressing the ENTER key) while the test is running. This entry re-initiates the BER values and restarts the test.
Det. Status
Displays the current status of the BER detector at the LTU.
NOT ACTIVE
Displays while the BER is not running.
SYNCING
Indicates that the BER qualification period is in progress (128 received bits are compared to the PRBS).
IN SYNC
Indicates that the BER test is in progress. The BER meter accumulates errors once per test interval (16 seconds). In a high bit error environment the test interval is shortened and the BER meter is updated every second.
Test Time
Displays the elapsed test time for the BER test.
Bit Errors
Displays the number of bits received that did not match the PRBS pattern. This field is updated every 30 seconds, with a maximum value of 255 per update.
BER
Displays the Bit Error Rate computer for the current test. This field is updated very 16 seconds, as is displayed in exponential form. The lowest positive displayable value is 1x10-11.
WorldDSL HDSL Line and Desktop Units
September 14, 2000
71
Firmware Download Utility
700-804-100-06, Revision 06
FIRMWARE DOWNLOAD UTILITY The Firmware Download Utility is a separate program and is not available from the Console screen menus.
This section describes the ETSI Firmware Download utility and how to use it to upgrade the line unit firmware. The ETSI Firmware Download utility is a program you can run on a PC to download new firmware to the LTU or NTU by connecting a standard RS-232 interface cable to the unit front panel V.24 Console port. When using the ETSI Firmware Download utility, follow these rules: •
Make sure the destination unit where the new firmware is to be upgraded is correct before pressing the ENTER key.
•
Do not disconnect the interface cable during the download process.
•
Do not abort the download once it has started.
Figure 65 shows the ETSI Firmware Download Utility menu. The upper area of the menu displays the configuration options, and the lower area displays messages during the download process. Instructions for using the download menu are provided
Figure 65. ETSI Firmware Download Utility Menu
72
September 14, 2000
WorldDSL HDSL Line and Desktop Units
700-804-100-06, Revision 06
Firmware Download Utility
INITIATING THE FIRMWARE DOWNLOAD To initiate the firmwsare download, go to the DOS prompt and press: dnl Table 33 describes firmware download menu options. Table 33.
Firmware Download Menu Options
Option
Description
PORT
Provides support for two communication ports: COM1 at Hex 3F8 COM2 at HEX 2F8
SPEED
Supports Standard (9600 bit/s), Medium (19.2K kbps), Fast (38.4 kbps), Faster (57.6 kbps) and TURBO (115.2 kbps) speeds. The number of data bits is fixed at 8, with no parity and 1 stop bit.
DESTINATION
The destination can be set to one of the following: LOCAL (unit connected to the maintenance terminal) LTU (LTU unit) NTU (NTU unit) NTU2 (NTU2 unit, in case of point-to-multipoint download) REGENERATOR1 REGENERATOR2
FILE NAME(a)
Enter the firmware download file name.
(a) The FILE NAME can be changed by pressing the DEL key, then typing the new file name. Once in the FILE NAME field, the download setup can be aborted only by typing CTRL + C . After typing the new file name, press the ENTER key to start the download sequence.
Table 34 describes how to navigate the firmware download menu. Table 34. Keystroke PAGE UP ↑
and
Navigating the Firmware Download Menu Result
or PAGE DOWN
↓
Change a setting, with the exception of the FILE NAME setting. Move from field to field.
ESC
Abort setup and returns to the DOS prompt.
ENTER
Start the download process.
Download progress messages include: •
program size
•
download time
•
program checksum
•
line-unit response
•
time out message (posted if the line unit does not response within five seconds; when this occurs, the download operation is aborted).
While downloading, the line card front panel LEDs all light, then a binary count sequence indicates progress. When downloading is complete, the unit resets.
WorldDSL HDSL Line and Desktop Units
September 14, 2000
73
Additional Safety Statements
700-804-100-06, Revision 06
ADDITIONAL SAFETY STATEMENTS The power required by the host and the total of all installed cards shall not exceed the power specification of the host receiver. The power requirements for the HDSL line and desktop units covered in this practice are listed in “Safety and Equipment Repair” on page 8. It is essential that when the equipment is installed in a receiver, the minimum creepage and clearance distances between the equipment and any devices that use or generate hazardous voltages (42.4 V peak AC or 60 Vdc) are as shown in Table 35. With the exception of the host connection, the minimum distance must be maintained between the card and all other assemblies that use or generate the voltages shown. The larger distance shown in brackets applies where the local environment within the host is subject to conductive pollution or dry nonconductive pollution that could become conductive due to condensation. Failure to meet these minimum distances would invalidate the approval. Table 35.
Minimum Creepage and Clearance Distances
Clearance (mm)
Creepage (mm)
Voltage Used or Generated by Cards
2.0
2.4 [3.8]
Up to 50 Vrms or DC
2.6
3.0 [4.8]
Up to 125 Vrms or DC
4.0
5.0 [8.0]
Up to 250 Vrms or DC
4.0
6.4 [10.0]
Up to 300 Vrms or DC
The analog telecommunications interface is intended to be connected to TNV circuits that may carry dangerous voltages. The HDSL cord must remain disconnected from the telecommunications system until the card has been installed and the cover replaced onto the receiver. If the cover needs to be re-opened, the HDSL cord must be disconnected prior to accessing any internal parts that may carry TNV. All ADC HiGain ETSI shelves and enclosures meet these host receiver requirements.
74
September 14, 2000
WorldDSL HDSL Line and Desktop Units
700-804-100-06, Revision 06
Appendix A - Specifications
APPENDIX A - SPECIFICATIONS INTERFACE/SYSTEM SPECIFICATIONS HDSL Interface Line Code
2B1Q
Line Rate
1168 kbps on each pair
Protection
K.20, K.21
Compliance
TS 101 135
Transmission Range:
Single Span (no Doubler) Wire Gauge
Maximum
Typical
Minimum (0 dB ETSI Noise)
0.4 mm (26 AWG)
3.9 km (12,795 ft.)
3.2 km (10,498 ft.)
2.8 km (9,186 ft.)
0.51 mm (24 AWG)
5.0 km (16,404 ft.)
4.1 km (13,451 ft.)
3.7 km (12,139 ft.)
0.64 mm (22 AWG)
6.5 km (21,325 ft.)
5.3 km (17,388 ft.)
4.8 km (15,748 ft.)
0.91 mm (19 AWG)
9.2 km (30,183 ft.)
7.6 km (24,934 ft.)
6.8 km (22,309 ft.)
Two Spans (with one EDU-840 Doubler) Wire Gauge
Maximum
Typical
Minimum (0 dB ETSI Noise)
0.4 mm (26 AWG)
7.6 km (24,934 ft.)
6.9 km (22,638 ft.)
5.6 km (18,372 ft.)
0.51 mm (24 AWG)
9.7 km (31,824 ft.)
8.7 km (28,543 ft.)
7.2 km (23,621 ft.)
0.64 mm (22 AWG)
12.6 km (41,338 ft.)
11.3 km (37,073 ft.)
9.3 km (30,511 ft.)
0.91 mm (19 AWG)
17.6 km (57,742 ft.)
15.8 km (51,837 ft.)
13.0 km (42,650 ft.)
Three Spans (with two EDU-840 Doublers) Wire Gauge
Maximum
Typical
Minimum (0 dB ETSI Noise)
0.4 mm (26 AWG)
8.0 km (26,246 ft.)
7.5 km (24,606 ft.)
7.1 km (23,294 ft.)
0.51 mm (24 AWG)
10.8 km (35,432 ft.)
9.6 km (31,496 ft.)
9.0 km (29,527 ft.)
0.64 mm (22 AWG)
14.1 km (46,259 ft.)
12.5 km (41,010 ft.)
11.8 km (38,713 ft.)
0.91 mm (19 AWG)
20.2 km (66,272 ft.)
17.5 km (57,414 ft.)
16.5 km (54,133 ft.)
WorldDSL HDSL Line and Desktop Units
September 14, 2000
75
Appendix A - Specifications
700-804-100-06, Revision 06
G.703 Interface Unstructured Leased Line
2.048 Mbps per ETS 300 247 (D2048U)
Structured Leased Line
2.048 Mbps per ETS 300 419 (D2048S)
Fractional E1
User selectable DS0 blocking, with user-programmable idle code
Line Code
HDB3
Line Rate
2.048 Mbps
Impedance (jumper selectable)
120-ohm balanced (twisted-pair) 75-ohm unbalanced (coax)
CRC-4 mode
User-selectable CRC-4 detection and generation
Compliance
ITU-T G.703, G.704, G.706, G.821, G.823, CTR 12, ETS 300 046
Nx64k Serial Data Interface Type
V.35,V.36, X.21, or RS-530 (RS-449)
Fractional
Nx64 kbps (where N equals 1 to 32)
Maximum Rate
2.048 Mbps
Control Signals
Request to Send (RTS) Data Terminal Ready (DTR) Local Loopback (LL) Remote Loopback (RL) Clear to Send (CTS) Data Set Ready (DSR) Received Line Signal Detector (RLSD) Test mode (TM)
Compliance
NET 2
Timing Clock Source
G.703 input, Nx64k data port input clock, HDSL recovered clock, Internal Oscillator, External 2.048 MHz clock (per G.703 par. 10)
Internal Oscillator
2.048 MHz ± 50 ppm
Performance Monitoring and Diagnostics
76
HDSL
Noise margin, pulse attenuation, ES, UAS
G.703 Interface
ES, SES, UAS per G.821. CRC-4 errored seconds, BPV seconds
Major Alarm Relay
Form-C relay contacts (NO, NC, C). Fail-safe operation
Loopbacks
Local interface loopback, local HDSL loopback (V.54 loop 3), remote loopback (V.54 loop 2)
Test Jacks
G.703 bridge jack on the front panel
September 14, 2000
WorldDSL HDSL Line and Desktop Units
700-804-100-06, Revision 06
Appendix A - Specifications
Alarms Can be individually set to Disabled, Minor, or Major (major alarms actuate the LTU or NTU alarm relay) E1 Interface
Loss of Signal (LOS) Loss of Framing (LFA) Alarm Indication Signal (AIS) Remote Alarm Indication (RAI)
Serial Dataport Interface
Loss of Clock (LOC)
External Clock
Loss of Clock (LOC)
HDSL (Per loop)
Margin, programmable threshold (MAR) Errored Seconds, programmable threshold (ES) Loss of Sync Word (LOSW) Power Feed Open (PFO) Power Feed Short (PFS)
Protection switch
Protection switch not available (NOPSW)
History E1 and HDSL Interface
24-Hour (15-minute intervals) and 7-Day (24-hour intervals) for ES and UAS
Alarm
Time stamp of first and last occurrence, number of occurrences for all enabled alarms
Power Requirements LTU Input voltage
-36 V to -72 Vdc
Remote power feed
Less than 120 V, less than 50 mA on each loop
Consumption
15 W (powering remote over 3-km loops), 6 W (not powering remote)
UTU (may be locally powered or line powered from an LTU) Local input voltage
36 V to -72 Vdc
Consumption
6W
Environmental Operating Temperature Range
0 °C to +50 °C -40 °C to +65 °C (List 4 cards only)
Humidity
Up to 95% non-condensing
Storage Temperature
40 °C to +70 °C
Storage Humidity
5% to 95% non-condensing
Regulatory Approvals Safety
EN 41003, EN 60950
EMC/EMI
EN 55022, EN 50082-1 (IEC 801-2/3/4), EN 61000-3-2 (with exception of ETU-851 and ETU-852)
WorldDSL HDSL Line and Desktop Units
September 14, 2000
77
Appendix B - Functional Description
700-804-100-06, Revision 06
APPENDIX B - FUNCTIONAL DESCRIPTION This section provides a generic functional description of HDSL line and desktop units with G.703 and/or Nx64k serial data port interfaces.
MAJOR COMPONENTS The major components of an HDSL line or desktop unit includes: •
G.703/704 (E1) interface
•
Nx64k serial data port interface (V.35, V.36, X.21, or RS-530)
•
HDSL interface
•
system timing circuits
•
processor
•
local and remote power supplies.
Figure 66 shows a simplified block diagram of an HDSL unit with both G.703 and Nx64k interfaces.
Figure 66.
78
HDSL Line and Desktop Unit Functional Block Diagram
September 14, 2000
WorldDSL HDSL Line and Desktop Units
700-804-100-06, Revision 06
Appendix B - Functional Description
G.703 Interface The G.703 interface performs the following basic functions: •
Uses two 2-wire cables (75 Ω coaxial or 120 Ω twisted-pair) to carry digital data at a rate of 2.048 Mbps; selection of 75 Ω or 120 Ω is made with jumpers on the line unit circuit boards. See the “HDSL Card Installation” on page 9 for jumper locations.
•
Recovers timing from the received E1 signal.
•
Monitors G.704 frame errors and multiframe (CRC-4) errors in the received E1 signal in structured applications.
•
Optionally generates multiframe (CRC-4) signals.
The G.703 interface can be configured for either unstructured or structured application modes (see “System Configuration” on page 12). These modes are described in detail in “Application Modes and Options” on page 83.
Nx64k Interface The Nx64k serial interface provides a high-speed synchronous interface for the transport of serial data at rates from 64 kbps to 2.048 Mbps. The user can configure the rate, in 64 kbps increments, at which the HDSL card transmits and receives data from the Nx64k interface. An example is shown in Figure 67. For proper operation of the entire HDSL circuit, select the identical number of time slots for both the LTU and NTU units (or UTUs configured as either). See “System Configuration” on page 12 to select the data rate and time slots. Select Unstructured Mode for applications using Nx64k interface ports at both ends of the circuit.
E1
E1
LTU-805 Network DTE
X.21 (1536 kbps)
UTU-804
Nx64k
Figure 67.
Nx64k
V.35
Customer DTE
(1536 kbps)
Transmission of Nx64k Serial Data
Figure 68 shows a fractional application where the Nx64k serial data is being transferred over an E1 network. The application mode must be structured and the maximum data rate available at the Nx64k port is 1920 kbps. Time slot 0 is regenerated at the G.703 output, and time slot 16 is filled with zeroes. See “Application Modes and Options” on page 83 for additional application examples.
E1 Network
G.703
E1 LTU-804
E1 UTU-804
Nx64k
Figure 68.
WorldDSL HDSL Line and Desktop Units
Nx64k
V.35 (1920 kbps)
Customer DTE
Transmission of Nx64k Serial Data onto an E1 Network
September 14, 2000
79
Appendix B - Functional Description
700-804-100-06, Revision 06
The line units provide a V.35, V.36, X.21, or RS-530 compliant connection at the data port connector (referred to as interface type). The appropriate interface type is configured as described in “System Configuration” on page 12. ADC offers V.35 and X.21 connector adapters (ECA-800 and ECA-801, respectively) to convert the D25F data port connector on the shelves and enclosures to standard V.35 (M34F) and X.21 (D15F) connectors (see “Additional Safety Statements” on page 74). Line units are always configured as DCE. Output control signals (CTS, DSR, RLSD) follow the interface standard or may be forced ON or OFF using the Console screen menus. The HDSL cards can respond to or ignore the input control signals, Local Loopback (LL) and Remote Loopback (RL), for loopback activation.
HDSL Interface The HDSL interface includes the HDSL framer, which performs HDSL multiplexing and demultiplexing functions, as well as transceivers and line interface circuits for each of the HDSL pairs. In the HDSL transmit direction, the framer accepts serial inputs from the G.703 interface, the Nx64k interface, or both interfaces, as shown in Figure 66. The data is placed on the two HDSL pairs along with the HDSL overhead bits for presentation to the transceivers. In the HDSL receive direction, data from the two HDSL transceivers are multiplexed into a single stream. Overhead bits are stripped and processed, and time slots are output to the G.703 and/or Nx64k serial data interface. The HDSL interface automatically detects and compensates for swapping the two HDSL pairs between the LTU and NTU. That is, pair 1 at the LTU may be connected to pair 2 at the NTU, and pair 2 at the LTU may be connected to pair 1 at the NTU. It is recommended, however, that the pairs not be swapped in order to ease diagnosis and repair of loop-related problems. Reversals of Tip and Ring wires for each pair are also automatically detected and accommodated. The HDSL Span Monitoring menu indicates if the pairs are swapped and if the Tip and Ring for each loop are reversed.
System Timing Circuits The LTU, NTU, and UTU units can synchronize to any one of the following timing sources: •
G.703: Input E1 clock.
•
Nx64K: Serial-data port receive clock.
•
INT: Internal oscillator.
•
HDSL: Recovered clock from received HDSL data.
•
EXT: External 2.048 MHz reference (only available in a shelf with a management unit installed).
Timing for the signals transmitted over the HDSL link is nominally derived from the selected primary timing source. In case of failure of the primary timing source, the system uses the internal 2.048 MHz oscillator as the backup timing source. The external reference clock option is only available for HDSL cards plugged into an Exchange office Management Shelf (EMS-830, EMS-831, or EMS-832) with an Exchange Office Management Unit (EMU-830) installed in the same shelf. The Transmit Clock option for the data port interface enables selection of the input clock source for the Transmit Data (SD) fed to the unit from the Data Terminal Equipment (DTE) device. The options are: •
INT RISING: Rising edge of the internal Send Timing (ST) clock.
•
INT FALLING: Falling edge of the internal Send Timing (ST) clock.
•
EXT: External Terminal Timing (TT) clock from the DTE.
Figure 69 on page 81 illustrates the Transmit Clock circuit function. When the data port has Nx64k selected as its primary timing source, the transmit clock is fixed to External. 80
September 14, 2000
WorldDSL HDSL Line and Desktop Units
700-804-100-06, Revision 06
Appendix B - Functional Description
Figure 69.
Data Port Transmit Timing
When the selected primary timing source is Internal, HDSL, or External, the transmit clock may be selected as Internal or External. The purpose of this selection is to compensate for a possible phase shift between SD and ST due to long interface cables or delay added by the DTE. Not all DTE equipment allows the DCE transmit clock (ST) to be sent back out as the transmit timing signal (TT), and the External transmit clock selection will not work with such equipment. In general, it is best to always set the Transmit Clock option to External, as long as the DTE provides TT. Only if the DTE does not provide TT should one of the Internal options be used.
WorldDSL HDSL Line and Desktop Units
September 14, 2000
81
Appendix B - Functional Description
700-804-100-06, Revision 06
Processor This device runs a program that in real-time: •
monitors the HDSL framer performance
•
responds to user requests
•
maintains a history of system performance.
Local and Remote Power Supplies The line units are powered by dc voltage. This voltage can be applied: •
locally through the dc connector on an EMS-830, EMS-831, or EMS-832 shelf, or through the dc connector on an ERE-810 or ERE-811 single-slot enclosure or ERE-821 dual-slot enclosure
•
locally through an ac-to-dc power supply, such as the one in the ERE-811 or ERE-821 enclosure
•
remotely from the LTU power supply over the HDSL lines to an NTU.
The LTU Remote Power Feed mode is the primary difference between an LTU and an NTU/UTU. The LTU cards contain circuitry that, when enabled, delivers 120 V at up to 50 mA over the HDSL loops to a remote NTU. Monitoring circuits automatically disable the power feed mode if the voltage on a line exceeds 120 V or if the current exceeds 50 mA. The Remote Power Feed mode should not be enabled on LTUs that are connected to baseband analog circuits that are part of the public telecommunication network in the United Kingdom. The NTR 14 limits the maximum open circuit voltage to 100 Vdc. See “Configure LTU and NTU Interfaces” on page 26 for instructions on how to disable the Remote Power Feed mode. Der Betrieb der Fernenergiezuspeisung sollte nicht auf LTUs aktiviert werden, welche an analoge Stromkreise des Basisbandes angeschlossen werden und die an das englische allgemeinen Fernmeldenetzes sind. Das NTR 14 begrenzt die maximale Spannung des geöffneten Stromkreises auf 100 VDC. Sehen Sie die Seite 26 für weitere Anweisungen wie man den Betrieb der Fernenergiezuspeisung sperrt.
82
September 14, 2000
WorldDSL HDSL Line and Desktop Units
700-804-100-06, Revision 06
Appendix B - Functional Description
APPLICATION MODES AND OPTIONS The system application mode defines how data is handled and transported by the HDSL circuit. All units in the circuit (LTUs, NTUs, UTUs, and doublers) operate in the same mode. The available application modes, which are described in the following sections, are: •
unstructured
•
structured
•
point-to-multipoint (PTM)
•
time slot prioritization (TSP)
•
single pair.
The appropriate application mode can be selected when configuring the HDSL system. See “System Configuration” on page 12.
Unstructured Mode Unstructured mode provides unframed transport of data at up to 2.048 Mbps. Dual-port operation (use of both the G.703 and Nx64k ports) is not possible in this mode because there is no method of identifying individual time slots within the datastream. Use unstructured mode when: •
both the LTU and NTU ends of the network use the G.703 port at 2.048 Mbps with no G.704 framing or channel blocking required.
•
both the LTU and NTU ends of the network use only the Nx64k data port operating at the same Nx64 rate; in this configuration, the user can select the data rate from 64 kbps to 2.048 Mbps in increments of 64 kbps.
•
one line unit uses the G.703 port at 2.048 Mbps with no G.704 framing and the other line unit uses the Nx64k data port at 2.048 Mbps.
Figure 70 illustrates a typical unstructured mode application. Table 36 on page 84 lists the unstructured mode system settings for transport of a 1024 kbps payload between a DTE device connected to an LTU-804 and a DTE device connected to an NTU-configured UTU-802 (single Nx64k V.36 port). The options and settings listed in Table 36 are defined in Table 10 on page 24 and Table 11 on page 27. The TT signal from the LTU-side DTE is used as the master clock in the circuit. Timing at the NTU side is recovered from the received HDSL signal. It is assumed that the NTU-side DTE cannot loop ST to TT, so the NTU transmit clock is set to INT - RISING.
E1 LTU-804 DTE
V.36 (1024 kbps)
Nx64k
Figure 70.
WorldDSL HDSL Line and Desktop Units
UTU-802 Nx64k
V.36 (1024 kbps)
DTE
Typical Unstructured Mode Application
September 14, 2000
83
Appendix B - Functional Description
700-804-100-06, Revision 06
Table 36.
Typical Unstructured Mode System Settings
Option Name
Setting
Application mode
UNSTRUCT LTU Interface (LTU-804)
Primary Timing Source
Nx64k
G. 703 Port CRC mode
DIS
Idle Code
FF
Data Rate/# of TSs
0
Beginning TS
0 Nx64k Port
Data Rate/# of TSs
1024 kbps/16
Beginning TS
0
Transmit Clock
EXT
All control Signals
STD
NTU Interface (UTU-802) Primary Timing Source
HDSL
Data Rate/# of TSs
1024 kbps/16
Beginning TS
0
Transmit Clock
INT_RISING
All control Signals
STD
Structured Mode In structured mode, data at the G.703 interface is framed according to G.704. This allows the fractional allocation of the total 2.048 MHz bandwidth between the two interface ports and the insertion of an idle code into unused time slots of the G.703 output. Figure 71 on page 85 illustrates a typical structured mode application. Table 37 on page 85 lists the typical structured mode system settings. The options and settings listed in Table 37 are defined in Table 10 on page 24 and Table 11 on page 27. In this example:
84
•
An LTU-804 is connected to an NTU-configured UTU-804.
•
Time slots 1-12 are used to transport telephony voice channels between the G.703 ports of the LTU and UTU and time slots 13-15 and 17-19 are used to transport a 384 kbps data service between the Nx64k ports of the units. Time slot 0 is regenerated at the G.703 output.
•
With the CRC-4 mode enabled, the input G.703 signal is monitored for CRC-4 multiframe errors and at the G.703 output, a new CRC-4 code is generated.
•
The CRC-4 passthrough mode, when enabled, permits all incoming bit values in time slot 0 to pass through unchanged. Time slot 16 is transported transparently between G.703 ports and may be used for telephony signaling or as an additional data channel.
September 14, 2000
WorldDSL HDSL Line and Desktop Units
700-804-100-06, Revision 06
Appendix B - Functional Description
•
An idle code selected at the system configuration menu (FF is used in the example), is inserted at each of the G.703 outputs for time slots 13-15 and 17-31.
•
The remote Nx64k port transmit clock is set to EXT, indicating that the remote DTE has a timing source or is loop timed.
Figure 71. Table 37.
Typical Structured Mode Application
Typical Structured Mode System Settings
Option Name
Setting
Application mode
STRUCT
Option Name
LTU Interface (LTU-804) Primary Timing Source
Setting
NTU Interface (UTU-804, V.35)
G.703
Primary Timing Source
G. 703 Port
HDSL
G. 703 Port
CRC-4 mode
ENABLE
CRC-4 mode
ENABLE
Idle Code
FF
Idle Code
FF
Data Rate/# of TSs
768 kbps/12
Data Rate/# of TSs
768 kbps/12
Beginning TS
1
Beginning TS
1
AIS mode
Half
AIS mode
Half
Nx64k Port
Nx64k Port
Data Rate/# of TSs
384 kbps/6
Data Rate/# of TSs
384 kbps/6
Beginning TS
13
Beginning TS
13
Transmit Clock
EXT
Transmit Clock
EXT
CTS
STD
CTS
STD
DSR
STD
DSR
STD
RLSD
STD
RLSD
STD
LL/RL
ENA
LL/RL
ENA
Choose the structured application mode from the Configure LTU and NTU Interface menus (page 26) for applications requiring use of: •
both ports or fractional use of just the G.703 port
•
embedded generation and detection of CRC-4 information
•
A-bit insertion.
In structured mode, with the CRC-4 mode enabled or disabled, time slot 0 is regenerated according to G.704 at the output of the G.703 interface port. When the CRC-4 passthrough mode is enabled, all time slot 0 bits are passed unchanged from the HDSL input to the G.703 output port (see Table 38 and “CRC-4 Passthrough Mode” on page 86). WorldDSL HDSL Line and Desktop Units
September 14, 2000
85
Appendix B - Functional Description
700-804-100-06, Revision 06
Table 38 lists the values that apply for the CRC-4 modes: Table 38.
Values for CRC-4 Modes
CRC-4 mode
FAS/NFAS
A bit is:
Si/CRC bit is:
Sa4 - Sa8 bits are:
Passthrough
Incoming values are not changed.
Disabled
FAS/NFAS locally generated
0 (normally) 1 during active LOS, AIS, or LFA condition
1
1
Enabled
FAS/NFAS locally generated
0 (normally) C1 - C4 bits are CRC code 1 during active LOS, E bits are: AIS, or LFA condition(a) 1 (normally) 0 (when error detected)
1
(a) LOS is Loss of Signal; AIS is Alarm Indication Signal; LFA is Loss of Frame Alignment
CRC-4 Passthrough Mode When this structured mode option is selected, all time slot 0 bits are passed unchanged from the HDSL input to the G.703 output port. This mode is useful when detection of CRC-4 errors is performed by customer equipment connected to the HDSL units. Configure the CRC-4 passthrough mode as described in “Configure LTU and NTU Interfaces” on page 26. The CRC-4 passthrough mode is not supported in PTM mode. An NTU will pass through CRC-4 bits based on the entire payload rather than their portion of the payload.
CAS Mode The Channel Associated Signaling (CAS) mode allows a Multiframe Alignment (MA) signal to be inserted into time slot 16 of the first frame (frame 0) of a 16-frame "multiframe" transmitted to the G.703 interface. All other time slot 16s in the multiframe are used for ABCD signaling bits which give supervision information for each payload time slot. The MA signal is applied as necessary to obtain frame alignment in mixed interface applications (such as G.703 and V.35). Configure the CAS mode as described in “Configure LTU and NTU Interfaces” on page 26.
Half AIS Mode When this structured mode option is selected, Alarm Indication Signal (AIS) is only generated when both loops go down. In the case of a single loop failing, the time slots in that loop will be set to 0xFF, with the remaining time slots unaffected. Configure the Half AIS mode as described in “Configure LTU and NTU Interfaces” on page 26.
86
September 14, 2000
WorldDSL HDSL Line and Desktop Units
700-804-100-06, Revision 06
Appendix B - Functional Description
Point-to-Multipoint Mode PTM mode allows one LTU to transmit payloads to two NTUs using only one HDSL pair for each NTU. This provides a cost-effective means of transporting user payload from an exchange office to two remote sites where only up to half the bandwidth is required at each site. In point-to-multipoint mode with BASIC mapping, time slots 1-15 are sent to the NTU at site number one (NTU1), time slots 17-31 are sent to the NTU at site number two (NTU2), and time slots 0 and 16 are sent to both NTUs. time slots 1-15 at NTU1 and 17-31 at NTU2 are returned to the LTU. Time slot 0 is generated at the LTU. Time slot 16 is filled with all ones (0xFF). A key feature of this mode is the isolation between the two loops. Payload service to one NTU is not affected by interruptions of the second loop such as errored seconds or loop down, and vice versa. Also, for diagnostic purposes, alarm thresholds can be set, and loopbacks activated, on a per loop basis. As a result, craft personnel at the NTUs are restricted from making global circuit wide changes that would impact service to the other NTU. Figure 72 shows a typical PTM application.
NTU1 HDSL Pair 1 Timeslots 0-16
UTU-80x
G.703 Interface (G.704 framing)
E1 G.703 Interface (G.704 framing)
LTU-804
Nx64k NTU2 HDSL Pair 2 Timeslots 0,16-31
Figure 72.
UTU-80x
V.35 Interface n x 64 kbps
Typical PTM Application
The following applies when configuring a PTM application: •
Timing - equipment at the LTU provides system timing. The DTE equipment connected to the NTUs must be slave timed for this mode to operate properly.
•
Power - locally power the remote NTUs because adequate power cannot be fed from an LTU to each NTU over their respective single pairs.
•
Distances and physical connections: –
Loop1 at the LTU connects to Loop1 at NTU1, Loop2 at the LTU connects to Loop1 of NTU2.
–
The standard ETSI range applies to each loop independently.
•
Doublers are not currently supported in a PTM application.
•
Firmware and Hardware Compatibility: –
All units require version 3.10 firmware or later. A warning message appears when the user attempts to change to PTM mode on non-compliant hardware.
–
PTM requires revision R20 or above of the LTU line card for proper operation. Inspect the bar code or WCN label for the revision number (see Table 3 on page 5).
WorldDSL HDSL Line and Desktop Units
September 14, 2000
87
Appendix B - Functional Description
•
700-804-100-06, Revision 06
Configuration: –
The CRC-4 passthrough mode (page 86) is not supported in the PTM application mode.
–
Typically, select BASIC time slot mapping. The CUSTOM1 and CUSTOM2 time slot mapping is for OEM application only and is detailed in the ETSI OEM Module Specification, OEM-HMS-SW1-01.
–
Time slot 16 is set to 0xFF (all ones) at the LTU to avoid errors when switching between Loop1 and Loop2 as the source of time slot 16 at the LTU.
–
The System Settings menu provides an NTU2 Interface submenu for setting parameters in PTM mode. Alarm thresholds may be set independently per loop. Loopbacks are also loop independent. There is no CUSTOMER LTU-I/F loopback in this mode. For more information, see “Configure LTU and NTU Interfaces” on page 26..
Table 39 shows a typical configuration in PTM mode. The options and settings listed in Table 39 are defined in Table 15 on page 35 and Table 16 on page 37. The remote Nx64k port transmit clock is set to EXT, indicating that the remote DTE has a timing source or is loop timed. Table 39.
Typical PTM Mode System Settings
Option Name
Setting
Option Name
Setting
Application mode
PTM
PTM Time Slot Mapping
BASIC
LTU Interface (LTU-804) Primary Timing Source
G.703
NTU1 Interface (UTU-801) Primary Timing Source
G. 703 Port
G. 703 Port
CRC-4 mode
DIS
CRC-4 mode
DIS
Idle Code
FF
Idle Code
FF
Data Rate/# of TSs
960 kbps/15
Data Rate/# of TSs
960 kbps/15
Beginning TS
1
Beginning TS
1
Nx64k Port
88
G.703
NTU2 interface (UTU-802)
Interface Type
V.35
Primary Timing Source
HDSL
Data Rate/# of TSs
960 kbps/15
Beginning TS
17
Data Rate/# of TSs
960 kbps/15
Transmit Clock
EXT
Beginning TS
17
CTS
STD
Transmit Clock
EXT
DSR
STD
CTS
STD
RLSD
STD
DSR
STD
LL/RL
ENA
RLSD
STD
LL/RL
ENA
Nx64k Port
September 14, 2000
WorldDSL HDSL Line and Desktop Units
700-804-100-06, Revision 06
Appendix B - Functional Description
Time Slot Prioritization Mode Time slot Prioritization (TSP) is a two-pair application that helps assure the delivery of up to half the E1 payload in the event of a transmission failure of one of the pairs. This is done by: •
designating time slots 1-15 as high priority traffic and routing them over pair 1
•
designating time slots 17-31 as low priority traffic and routing them over pair 2.
An example of user prioritization by workgroup is shown in Figure 73. If pair 1 transmission performance should be disrupted, high priority traffic is re-routed to pair 2, thus bumping the low priority traffic. After switching has occurred, time slots 17-31 at the G.703 output are filled with an Alarm Indication Signal (AIS or unframed all ones). When Loop1 recovers, time slots 1-15 are maintained on pair 2, but time slots 17-31 are restored on pair 1. A subsequent failure of pair 2 would cause the high priority time slots 1-15 to be switched back to pair 1.
High Priority Workgroup PBX routes these calls to TSs 1-15 Exchange Office Switch
G.703
Pair 1
E1
E1
G.703
PBX
Time slots 0-16 LTU
Low Priority Workgroup
NTU
PBX routes these calls to TSs 17-31 if 1-15 are not available
Pair 2 Nx64k
Figure 73.
Time slots 0, 16-31
Nx64k
Time Slot Prioritization Application Designating Priority Workgroups
This application works much like protection switching, except that only a single pair of a link is protected instead of the entire circuit. It is very useful when the service provider must increase the reliability of a fractional E1 link by guarding against physical damage to a pair. Such damage may result from lightning surges, technician error, or lines being cut by construction equipment. Of course, each of the two pairs should take different physical routes between the local and remote HDSL units to minimize the chance of physical disturbance to both pairs. Figure 74 shows a time slot prioritization application for fractional voice and data service. The system tolerates Tip and Ring reversal within a pair and automatically compensates for it. Apply local power to the remote NTU unit when operating in the TSP mode. Adequate power cannot be fed from an LTU to NTU over a single pair while maintaining the ITU recommendation for dc voltage on a line (less than 120 V).
PBX G.703 (5 Channels) G.703 Service Provider Data Network
E1
5 Voice Channels LTU V.35
Pair 1 Voice Channels in TSs 1-5, Data in TSs 6-15
E1 LAN
NTU
Pair 2 Nx64k
(640 kbps)
Standby Pair. TSs 17-31 not used.
Nx64k
V.35 (640 kbps)
ROUTER
LAN
Customer Premises
Figure 74.
Time Slot Prioritization Application Showing Pair Protection for Fractional Voice and Data Service
WorldDSL HDSL Line and Desktop Units
September 14, 2000
89
Appendix B - Functional Description
700-804-100-06, Revision 06
Single-Pair Mode Single-pair mode allows required bandwidth transport using only one twisted copper pair of wire between the LTU and NTU. Time slots 0-16 are transported over Loop1, while Loop2 is unused (the HDSL transceiver is turned off for Loop2). All Loop2 alarms are automatically disabled, and no statistics are displayed. Many communications applications, such as video conferencing, do not require the full bandwidth of a 2 Mbps E1 circuit. Figure 75 shows a single-pair application. For applications that require up to half of an E1 payload, the HDSL circuit may be deployed using only one copper pair instead of two. This mode may be used to transport a fractional portion of an E1 G.703/704 signal, Nx64k of data from a serial port such as V.35 (for N < = 15), or data from both ports if a dual port unit such as the LTU-804 is used. The user may designate up to 15 time slots from the interface port(s) to be transported.
E1 Network
G.703 E1 TSs 0-16 used, 17-31 filled with idle code
E1 1 Pair
LTU
G.703 TS 0,1-9,16
TDM MUX
Services
NTU
Nx64k
Nx64k
V.36 (384 kbps)
Monitor
Video Conferencing System
Figure 75. Single Pair Application If data from the G.703 port is to be transported, it must be framed according to the G.704 standard. Time slots 0 (framing) and 16 (signaling) plus designated payload time slots are transported over the pair. The designated payload time slots may occupy any contiguous block within the first 15 time slots of the G.704 payload (the G.704 payload is defined as time slots 1-15, 17-31). For example, the designation of time slots 2-8 is allowed, but the designation of time slots 2, 4, 6, and 8 is not, nor is the designation of time slots 18-27. Time slot 0 is always regenerated at the output of the G.703 port and TS 16 is passed transparently. Time slots not designated for transmission, as well as time slots 17-31, are filled with a user-programmable idle code (0xFF, for example) at the G.703 output port. Up to 960 kbps from the Nx64k serial data port may be transported. The single copper pair used for transmission must be connected between the HDSL ports of pair 1 of the LTU and NTU units. Alarms and indications associated with pair 2 are automatically disabled. The remote NTU unit should be locally powered when operating in the single-pair mode because adequate power cannot be fed from an LTU to NTU over a single pair if the ITU recommendation for dc voltage on a line is to be maintained (less than 120 V).
90
September 14, 2000
WorldDSL HDSL Line and Desktop Units
700-804-100-06, Revision 06
Appendix B - Functional Description
PERFORMANCE MONITORING AND HISTORY The LTU and NTU units provide extensive real time, non-disruptive monitoring of HDSL transmission performance parameters for all units in a circuit. Performance of the user interface ports is also monitored. Current cumulative counts of the past 24 hours and historical data in the form of 24-hour history (in 15-minute increments) and a 7-day history (in 24-hour increments) are available to assist in identifying problem sources during troubleshooting. See “Monitoring System Activity and Performance” on page 43 for information on performance screens. The monitored parameters are described in Table 40. Table 40.
Monitored HDSL Transmission and Interface Performance Parameters
Monitored Parameter
Description
HDSL Noise Margin
A measure of the ratio of signal power to noise power, in decibels (dB), at a receiver point. A value of 0 dB means that the predicted transmission BER is equal to 10–7, a value of 6 dB means the predicted transmission BER is equal to 10–10. The Main menu status display continuously updates the margin value.
HDSL CRC-6
A six-bit word in every HDSL frame, representing a calculation based on all the bits in that frame. Any mismatch at the receiver, between the received CRC-6 and the one calculated, based on the received data in the frame, indicates that one or more bits were received in error. The units use this parameter to derive HDSL ES.
HDSL Loss of Sync Word (LOSW)
The unit has detected an error in one or more bits in six consecutive HDSL sync words. ETR 152 requires two consecutive sync words to be received without error to clear this condition. A LOSW condition generally indicates the loop is down, thus data cannot be transmitted.
G.703 Bipolar Violation Seconds (BPV)
The unit has detected the same polarity for consecutive ones at the G.703 inputs, an indication that an error has occurred. This can happen if an extra pulse is inserted or if a pulse is omitted. The LTU and NTU units use this parameter to derive G.703 ES.
G.703 CRC-4 Errors
The CRC-4 number is a four-bit number transmitted in bit position 1 of time slot 0 in even frames of a G.704 sub-multiframe. The system computes its own CRC-4 number from received sub-multiframes and compares it to the received CRC-4 number. Monitoring of the received CRC-4 number is done only when the system is operating in structured mode with the CRC-4 mode enabled.
Based on the monitored parameters, the LTU and NTU units derive the following performance parameters: HDSL Errored Second (ES)
An interval of one second during which at least one CRC-6 error is detected at the incoming HDSL port (Loop1 or Loop2) or there is an LOSW condition.
HDSL Unavailable Second (UAS)
A second during which a loop is down.
G.703 Errored Second
An interval of one second during which at least one bipolar violation (BPV) or CRC-4 error occurs at the incoming G.703 port.
G.703 Severely Errored Second (SES)
An interval of one second during which any of the following conditions occur at the incoming G.703 port: 1 Loss of Signal (LOS) at the G.703 input 2 Alarm Indication Signal (AIS) at the G.703 input 3 Loss of Frame or CRC-4 Multiframe Alignment (LFA) at the G.703 input
G.703 Unavailable Second
A G.703 unavailable period that begins at the onset of 10 consecutive Severely Errored Seconds (SESs) and ends with the next period of 10 consecutive non-SESs (as per G.826 paragraph A.1). G.703 ES and SESs are not incremented during unavailable periods.
WorldDSL HDSL Line and Desktop Units
September 14, 2000
91
Appendix B - Functional Description
700-804-100-06, Revision 06
ALARMS The LTU and NTU units generate alarms for problem conditions on the HDSL transmission facility and at the local application interface. Alarms can be individually enabled or disabled as well as specified whether the alarm reports as a Major or Minor alarm. See “System Configuration” on page 12 to configure alarms. See “Monitoring System Activity and Performance” on page 43 to view alarm conditions. The alarms are described in Table 41. Table 41. HDSL Transmission and Application Interface Alarms Alarm
Description
HDSL Alarms
HDSL alarms (loop-specific) include:
Loss of Sync Word (LOSW) Margin (MAR)
The unit cannot receive data over the given HDSL loop.
Errored HDSL Second (ES) Threshold Exceeded
The number of HDSL ES has exceeded the threshold set to give advance warning that HDSL performance is deteriorating. This threshold can be set from 0 to 255 ES over a 24-hour period, or disable the alarm completely.
Power Feed Open (PFO)
An undercurrent condition as detected by the LTU exists for the given pair (50mA). A PFS alarm indicates an over-current condition due to wire shorting or an NTU failure. The LTU automatically turns off power feeding to both loops in response to a PFO or PFS condition on a single loop. No user intervention is required.
G.703 Interface Alarms
The HDSL noise margin of the loop has fallen below the set threshold.
G.703 Interface (E1) alarms include:
Loss of Signal (LOS)
Indicates that the data received at the interface contains 255 consecutive zeroes, which indicates a loss of signal (as per G.775). The system releases the alarm when the signal contains at least 32 ones within 255 bits.
Loss of Frame Align (LFA)
Indicates three consecutive G.704 frame signals were not detected (structured mode only). Resets when the unit detects two correctly aligned frame signals. In CRC-4 enabled mode, it may also indicate the loss of CRC-4 Multiframe signal.
Receive Alarm Indication Signal (AIS) Remote Alarm Indication Signal (RAI) No Protection Switch (NOPSW)
Indicates the receipt of “unframed all ones.” Indicates three consecutive A-bits set to one were detected (structured mode only). The protection (backup) circuit is not available. This alarm is active on both the primary and protection circuits when the protection switch command is enabled and the protection circuit is unavailable. It is also active on both circuits during a protection switch event. It is hardcoded as a Major alarm and cannot be configured as a Minor alarm or disabled. It is displayed on the LTU/NTU Interface Alarm History screens.
Nx64k Interface Alarm
The Nx64k Interface alarm is Loss of Clock (LOC). The DTE transmit clock (TT) was lost for the previous second. This alarm is reset when the clock is active again.
External Clock Alarm
The External Clock alarm is Loss of Clock (LOC). The external clock was lost for the previous second. Applies to loss of external clock when EXT timing is used. This alarm is reset when the clock is active again.
Alarm Indicators
The HDSL ALM and I/F ALM indicators on the front panel of the unit indicate local unit alarm conditions.
92
September 14, 2000
WorldDSL HDSL Line and Desktop Units
700-804-100-06, Revision 06
Appendix B - Functional Description
Table 41.
HDSL Transmission and Application Interface Alarms (Cont.)
Alarm
Description
Alarm History
The units also compile an alarm history that can be viewed from a maintenance terminal, as described in “LTU and NTU Interface Alarm History Screen” on page 56. For each alarm, the report provides: the date and time of the first alarm occurrence (since the alarm history was cleared), the last occurrence, the current status, and the number of times the alarm has occurred. This report is very useful when evaluating system performance.
Full AIS mode
In the Full AIS mode, an Alarm Indication Signal or “unframed all ones” is generated at the unit's G.703 output under the following conditions: 4 When not enough HDSL channels are available for full transmission of user payload, such as during a Cold Start when a single HDSL loop is down. The Half AIS mode, described below, is disabled under this condition. 5 In response to a loss of signal (LOS) condition at the remote G.703 input port with no loopback enabled towards the local user. This is true even if the LOS alarm is disabled at the remote interface. 6 During any loopback away from the local unit, specifically at the LTU under all customer loopbacks and at the NTU under all network loopbacks. 7 When zero time slots are mapped in unstructured mode (regardless of the idle code setting). Also, in unstructured application mode, an Alarm Indication Signal received at the remote unit G.703 port is passed unmodified out the local G.703 port. In the TSP and Half AIS modes, both loops must be down for an Alarm Indication Signal to be generated.
Half AIS mode
When this structured mode option is selected, an Alarm Indication Signal is only generated when both loops go down. In the case of a single loop failing, the time slots in that loop will be set to 0xFF, with the remaining time slots unaffected. Configure the Half AIS mode as described in “Configure LTU and NTU Interfaces” on page 26.
SERVICE CHANNEL With the use of external test equipment, a voice service channel may be set up between the LTU and NTU allowing technicians to communicate. The service channel utilizes one 64k time slot in the structured mode for voice communication.
WorldDSL HDSL Line and Desktop Units
September 14, 2000
93
Appendix B - Functional Description
700-804-100-06, Revision 06
PROTECTION SWITCH The Protection Switch option settings are on the point-to-point System Settings menu (see Table 10 on page 24). The LTU and NTU units may be configured in a 1+1 protection switching mode. This feature protects critical (high-priority) traffic by providing a backup circuit that continues to carry traffic in case of a primary circuit failure. If necessary, the backup circuit can be used to provide low-priority service (which would be disrupted in case of primary failure), so the additional payload capacity of the backup path is not wasted. Protection switching increases system reliability and guarantees trouble-free transm??ission in the case of deterioration or damage to the copper loops, or in the case of an HDSL card failure.? Protection switching supports only the G.703 interface. Switching of Nx64k ports is not supported. The Protection Switch option is not available in the PTM mode. MAR, ES, and LOSW alarms can be set to PSW Protection Switch criteria. Protection switch alarms are equivalent to Major alarms. They cause LED indications, activate the major alarm relay, are stored in history, activate a protection switch alarm, and cause the circuit to switch.
Figure 76 illustrates the protection switch concept and shows a functional block diagram of the protection switch module (EPS-831). For more information on the protection switching mode, see the technical practice for the EPS-831 Protection Switch Module, section number 700-839-100-xx.
EPS-831
High Priority G.703 interface
EPS-831
Primary LTU
Two HDSL Pairs
Protection LTU
Figure 76.
High Priority G.703 interface
Control
Control
Low Priority G.703 interface (Optional)
Primary NTU
Two HDSL Pairs
Protection NTU
Low Priority G.703 interface (Optional)
1 + 1 Protection Switch Functionality
HOT SWAPPING The HDSL cards can be inserted and removed from any compatible shelf or enclosure with the power turned on. This will not cause damage to the units nor will it cause interference to any other HDSL circuits that are operating within the same shelf or enclosure.
94
September 14, 2000
WorldDSL HDSL Line and Desktop Units
700-804-100-06, Revision 06
Appendix B - Functional Description
CONNECTOR AND CONNECTOR ADAPTER PINOUTS This section lists the pinouts for the ETU-851 and ETU-852 rear panel connectors and ECA-80x connector adapters.
ETU-851 and ETU-852 Connector Pinouts The pinouts for the ETU-851 and ETU-852 rear panel connectors are listed in Table 42 through Table 45. Table 42.
ETU-851 D15F 120-ohm G.703 Interface Connector Pinouts
Pin(a)
Signal
Description
1
E1-RTIP
G.703 Input, Tip
2
E1_R120SCRN
G.703 Input port screen
3
E1_TTIP
G.703 Output, Tip
4
CGND
Chassis ground
9
E1_RRING
G.703 Input, Ring
11
E1_TRING
G.703 Output, Ring
(a) All other pins are not used
Table 43.
Pinouts, ETU-851 BNC 75-ohm G.703 In and Out Connectors
Pin
Signal
Description
Center
E1_RTIP
G.703 Input, Tip
Shield
E1_RRING
G.703 Input, Ring
Center
E1_TTIP
G.703 Output, Tip
Shield
E1_TRING
G.703 Output, Ring
Table 44.
ETU-851 and ETU-852 D9F HDSL Line Connector Pinouts
Pin(a)
Signal
Description
4
HDSL_RING_A
HDSL Loop 1 (Ring)
9
HDSL_TIP_A
HDSL Loop 1 (Tip)
1
HDSL_RING_B
HDSL Loop 2 (Ring)
6 HDSL_TIP_B (a) All other pins are not used.
WorldDSL HDSL Line and Desktop Units
September 14, 2000
HDSL Loop 2 (Tip)
95
Appendix B - Functional Description
700-804-100-06, Revision 06
Table 45.
ETU-852 D25F Data Port Connector Pinouts
Pin(a)
Signal Name
V.35
V.36
X.21
7
Signal Ground
SG
SG
SG
2 14
Send Data
SD_A SD_B
SD_A SD_B
T_A T_B
Input
3 16
Receive Data
RD_A RD_B
RD_A RD_B
R_A R_B
Output
15 12
Send Timing
SCT_A SCT_B
ST_A ST_B
S_A S_B
Output
17 9
Receive Timing
RCT_A RCT_B
RT_A RT_B
not used
Output
24 11
Terminal Timing
SCTE_A SCTE_B
TT_A TT_B
TT_A TT_B
Input
5 13
Clear to Send
CTS
CTS
not used
Output
6 22
Data Set Ready
DSR
DSR
not used
Output
8 10
Received Line Signal Detect
RLSD
RLSD
I_A I_B
Output
25
Test Mode
TM
TM
not used
Output
4 19
Request to Send
RTS
RTS
C_A C_B
Input
20 23
Data Terminal Ready
DTR
DTR
not used
Input
18
Local Loopback
LL
LL
not used
Input
21
Remote Loopback
RL
RL
not used
Input
DCE Input/Output
( a) All other pins are not used.
ECA-800 Connector Adapter (DB25M to M34F for V.35) The ECA-800 connector adapter, part number 150-1470-01, converts the DB25F data port connector on the ETU-852 rear panel to a standard V.35 34-pin female connector (Figure 77). Table 46 on page 97 lists the ECA-800 pinouts.
Figure 77.
96
ECA-800 DB25M to M34F (V.35) Connector Adapter
September 14, 2000
WorldDSL HDSL Line and Desktop Units
700-804-100-06, Revision 06
Appendix B - Functional Description
Table 46.
ECA-800 DB25M to M34F (V.35) Connector Adapter Pinouts
DB25M Connector
M34F (V.35) Connector
Signal
pin
pin
Signal
Shield
1
A
Frame ground
Send Data A
2
P
Send Data A
Send Data B
14
S
Send Data B
Receive Data A
3
R
Receive Data A
Receive Data B
16
T
Receive Data B
Request to Send A
4
C
Request to Send
Clear to Send A
5
D
Clear to Send
Data Set Ready A
6
E
Data Set Ready
Data Terminal Ready A
20
H
Data Terminal Ready
Signal Ground
7
B
Signal Ground
Received Line Signal Detect A
8
F
Received Line Signal Detect
Send Timing A
15
Y
Serial Clock Transmit A
Send Timing B
12
AA
Serial Clock Transmit B
Receive Timing A
17
V
Serial Clock Receive A
Receive Timing B
9
X
Serial Clock Receive B
Terminal Timing A
24
U
Serial Clock Transmit External A
Terminal Timing B
11
W
Serial Clock Transmit External B
Local Loopback
18
L
Local Loopback
Remote Loopback
21
N
Remote Loopback
Test Mode
25
NN
Test Mode
ECA-801 Connector Adapter (DB25M to DB15F for X.21) The ECA-801 connector adapter, part number 150-1471-01, converts the DB25F data port connector on the ETU-852 rear panel to a standard X.21 15-pin female connector (Figure ). Table 47 on page 98 lists the ECA-801 pinouts.
14 1
8
9
15 25
Figure 78.
WorldDSL HDSL Line and Desktop Units
1
13
ECA-801 DB25M to DB15F (X.21) Connetor Adapter
September 14, 2000
97
Appendix B - Functional Description
700-804-100-06, Revision 06
Table 47.
ECA-801 DB25M to DB15F (X.21) Connector Adapter Pinouts
DB25M Connector Signal
DB15F (X.21) Connector pin
pin
Signal
Send Data A
2
2
Send Data A
Send Data B
14
9
Send Data B
Receive Data A
3
4
Receive Data A
Receive Data B
16
11
Receive Data B
Request to Send A
4
3
Control A
Request to Send B
19
10
Control B
Signal Ground
7
8
Signal Ground
Receive Line Signal Detect A
8
5
Indication A
Receive Line Signal Detect B
10
12
Indication B
Receive Timing A
17
6
Signal Element Timing A
Receive Timing B
9
13
Signal Element Timing B
Terminal Timing A
24
1
DTE Signal Element Timing A
Terminal Timing B
11
15
DTE Signal Element Timing A
ECA-802 Connector Adapter (DB9M to RJ-45) The ECA-802 connector adapter, part number 150-1472-0, converts the DB9F HDSL line connector on the ETU-851 and ETU-852 rear panel to an RJ-45 modular style connector (Figure 79). Table 48 lists the ECA-802 pinouts.
1
8
6 9
Figure 79. Table 48.
5
ECA-802 DB9M to RJ-45 Connector Adapter
ECA-802 DB9M to RJ-45 Connector Adapter Pinouts
DB9M Connector
98
1
RJ-45 Connector
Signal
Pin
Pin
Signal
HDSL Loop 1 (Ring)
4
1
HDSL Loop 1 (Ring)
HDSL Loop 1 (Tip)
9
2
HDSL Loop 1 (Tip)
HDSL Loop 2 (Ring)
1
4
HDSL Loop 2 (Ring)
HDSL Loop 2 (Tip)
6
5
HDSL Loop 2 (Tip)
September 14, 2000
WorldDSL HDSL Line and Desktop Units
700-804-100-06, Revision 06
Appendix B - Functional Description
ECA-804 Connector Adapter (DB9M to Four-Position Terminal Block) The ECA-804 connector adapter, part number 150-1474-01, converts the DB9F HDSL line connector on the ETU-851 and ETU-852 rear panel to a four-position terminal-block style connector (Figure 80). Table 49 lists the ECA-804 pinouts.
1 2 3 4
Figure 80.
Table 49.
6 9
1
5
ECA-804 DB9M to Four-Position Terminal Block Connector Adapter
ECA-804 DB9M to Four-Position Terminal Block Connector Adapter Pinouts Four-Position Terminal Block
D9M Connector
Signal
Pin
Pin
Signal
HDSL Loop 1 (Ring)
1
4
HDSL Loop 1 (Ring)
HDSL Loop 1 (Tip)
2
9
HDSL Loop 1 (Tip)
HDSL Loop 2 (Ring)
3
1
HDSL Loop 2 (Ring)
HDSL Loop 2 (Tip)
4
6
HDSL Loop 2 (Tip)
WorldDSL HDSL Line and Desktop Units
September 14, 2000
99
Appendix C - Compatibility
700-804-100-06, Revision 06
APPENDIX C - COMPATIBILITY The compatibility of the ADC HiGain ETSI product line is listed in Table 50. Table 50. Model
HiGain ETSI Product Compatibility
Description
Part Number
Compatible With
Shelves and Enclosures EMS-830
Exchange office management shelf, rear connector access
150-1400-01
All HDSL Cards
EMS-831
Exchange office management shelf, front connector access
150-1401-01
All HDSL Cards
EMS-832
Exchange office management shelf, front connector access
150-1402-01
All HDSL Cards
ERE-810
Single slot remote enclosure
150-1410-01
All HDSL Cards
ERE-811 L1
Single slot remote enclosure; ac powered
150-1411-01
All HDSL Cards
ERE-811 L2
Single slot remote enclosure; ac or dc powered
150-1411-02
All HDSL Cards
ERE-811 L3
Single slot remote enclosure; ac or dc powered, power-fail alarm
150-1411-03
UTU-801/UTU-804 L3
ERE-811 L4
Single slot remote enclosure; dc pwr, wide temp range
150-1411-04
UTU-801 L4
ERE-821
Dual-slot remote enclosure; ac powered
150-1416-01
All HDSL Cards
ERE-826
Single slot remote enclosure
150-1412-01
All HDSL Cards
HDSL Cards LTU-801 L1A LTU-801 L1B
Two-pair line termination unit with G.703 interface
150-1420-01A 150-1420-01B
All NTUs, UTUs, and ETUs
LTU-802 L1A LTU-802 L1B
Two-pair line termination unit with Nx64k V.35 interface
150-1420-02A 150-1420-02B
All NTUs, UTUs, and ETUs
LTU-803
Two-pair line termination unit with Nx64k V.36/X.21 interface
150-1420-03
All NTUs, UTUs, and ETUs
LTU-804 L1A LTU-804 L1B
Two-pair line termination unit with G.703 and Nx64k V.35 interfaces
150-1420-04A 150-1420-04B
All NTUs, UTUs, and ETUs
LTU-805
Two-pair line termination unit with G.703 and Nx64k V.36/X.21 interfaces
150-1420-05
All NTUs, UTUs, and ETUs
NTU-801
Two-pair network termination unit with G.703 interface
150-1420-21
All LTUs, UTUs, and ETUs
NTU-802
Two-pair network termination unit with Nx64k V.35 interface
150-1420-22
All LTUs, UTUs, and ETUs
NTU-803
Two-pair network termination unit with Nx64k V.36/X.21 interface
150-1420-23
All LTUs, UTUs, and ETUs
NTU-804
Two-pair network termination unit with G.703 and Nx64k V.35 interfaces
150-1420-24
All LTUs, UTUs, and ETUs
NTU-805
Two-pair network termination unit with G.703 and Nx64k V.36/X.21 interfaces
150-1420-25
All LTUs, UTUs, and ETUs
UTU-801 L1A UTU-801 L1B
Two-pair LTU/NTU configurable HDSL card with G.703 interface
150-1420-31A 150-1420-31B
All LTUs, NTUs, UTUs, and ETUs
UTU-801 L4
Two-pair LTU/NTU configurable HDSL card with G.703 interface, wide temperature range
150-1420-31W
All LTUs, NTUs, UTUs, and ETUs
UTU-802 L1A UTU-802 L1B
Two-pair LTU/NTU configurable HDSL card with Nx64k interface
150-1420-32A 150-1420-32B
All LTUs, NTUs, UTUs, and ETUs
UTU-804 L1A UTU-804 L1B
Two-pair LTU/NTU configurable HDSL card with G.703 and Nx64k interfaces
150-1420-34A 150-1420-34B
All LTUs, NTUs, UTUs, and ETUs
100
September 14, 2000
WorldDSL HDSL Line and Desktop Units
700-804-100-06, Revision 06
Appendix C - Compatibility
Table 50. Model
HiGain ETSI Product Compatibility (Cont.)
Description
Part Number
Compatible With
150-1483-01
All EMS-83x Shelves
150-1480-01
All EMS-83x Shelves
Power Supplies EAC-830
Rack-mounted DC power supply with power-fail relay Shelf-Mounted Protection Switch Module
EPS-831
Protection switch module Self-Enclosed Desktop Units
ETU-851
Two-pair LTU/NTU configurable HDSL card with G.703 interface in plastic enclosure
150-1430-01
All LTUs, NTUs, UTUs, and ETUs
ETU-852
Two-pair LTU/NTU configurable HDSL card with Nx64k V.35 interface in plastic enclosure
150-1430-02
All LTUs, NTUs, UTUs, and ETUs
ETU-853
Two-pair LTU/NTU configurable HDSL card with Nx64k V.36/X.21 interface in plastic enclosure
150-1430-03
All LTUs, NTUs, UTUs, and ETUs
ETU-871
Two-pair LTU/NTU configurable HDSL card with G.703 interface in plastic enclosure
150-1431-01
All LTUs, NTUs, UTUs, and ETUs
ETU-872
Two-pair LTU/NTU configurable HDSL card with Nx64k V.35 interface in plastic enclosure
150-1431-02
All LTUs, NTUs, UTUs, and ETUs
ETU-881
Two-pair LTU/NTU configurable HDSL card with G.703 interface in plastic enclosure
150-1431-01
All LTUs, NTUs, UTUs, and ETUs
ETU-882
Two-pair LTU/NTU configurable HDSL card with Nx64k V.35 interface in plastic enclosure
150-1431-02
All LTUs, NTUs, UTUs, and ETUs
Connector Adapters ECA-800
D25M to M34F connector adapter (V.35)
150-1470-01
Data port on ERE-810, ERE-811, ERE-21, ETU-852, and ETU-853
ECA-801
D25M to D15F connector adapter (X.21)
150-1471-01
Data port on ERE-810, ERE-811, ERE-21, ETU-852, and ETU-853
ECA-802
DB9M to RJ-45 connector adapter (HDSL)
150-1472-01
HDSL line connector on ERE-810, ERE-811, ERE-21, ETU-851, ETU-852, and ETU-853
ECA-804
DB9M to 4-position terminal block connector (HDSL)
150-1474-01
HDSL line connector on ERE-810, ERE-811, ERE-21, ETU-851, ETU-852, and ETU-853
ECA-805
Desktop Unit 48V 3-pin to terminal block connector adapter
150-1475-01
Dc power connector on ETU-851, ETU-852, and ETU-853
ECA-806
DB15M to RJ-45 connector adapter (G.703/120Ω)
150-1476-01
120Ω G.703 connector on ERE-810, ERE-811, ERE-21, and ETU-851
ECA-807
DB25M to DB37F connector adapter (RS-449)
150-1477-01
Data port on ERE-810, ERE-811, ERE-21, and ETU-851
WorldDSL HDSL Line and Desktop Units
September 14, 2000
101
Appendix D - Product Support
700-804-100-06, Revision 06
APPENDIX D - PRODUCT SUPPORT CUSTOMER ASSISTANCE Regional Sales Offices Customer assistance, sales, and product information is available at your regional sales offices. Contact the regional sales office at the location serving your area. Table 51. Regional Sales Offices Region
Location
Hours
Telephone Number
Fax Number
United States/Canada
Tustin, California USA
24-hours-a-day, 7-days-a-week
+714.832.9922
+714.832.9908
Latin America
Miami Beach, Florida USA
Monday - Friday, 9:00AM to 5:00PM Monday - Friday, 8:00AM to 5:00PM
+305.957.8100
+305.949.5804
+55.19.865.9205
+55.19.865.9202
Monday - Friday, 8:00AM to 5:30PM Monday - Friday, 8:00AM to 5:00PM
+41.56.483.4400
+41.56.483.4401
+44.1256.698054
+44.1256.698254
Campinas, Brasil Europe
Switzerland United Kingdom
Middle East/Africa
Dubai, U.A.E.
Sunday - Thursday, 9:00AM to 6:00PM
+971.4.343.4949
+971.4.343.0656
Asia Pacific/China
Hong Kong (North East Asia)
Monday - Friday 9:00AM to 5:00PM Monday - Friday 8:30AM to 5:00PM Monday - Friday 8:30AM to 5:00PM
+852.2802.2918
+852.2802.2789
+86.10.6847.6856
+86.10.6847.6857
+86.20.8752.0977
+86.20.8752.0047
Beijing (North China) Guangzhou (South China)
Ordering Procedure Orders may be placed through ADC regional sales offices by telephone, fax or, mail. A fax is preferred. When placing an order, please provide the following information: •
Customer purchase order number;
•
Ship-to and bill-to addresses;
•
Part numbers and quantity required;
•
Requested delivery date;
•
Preferred method of shipment.
After receiving your order, ADC will send an Order Acknowledgment to the bill-to and ship-to addresses (unless directed otherwise). ADC Customer Service Group provides expert pre-sales and post-sales support and training for all its products.
102
September 14, 2000
WorldDSL HDSL Line and Desktop Units
700-804-100-06, Revision 06
Appendix D - Product Support
TECHNICAL SUPPORT Technical support is available 24 hours a day, 7 days a week by contacting the ADC Wireline Systems Division Customer Service Engineering Group at one of the following numbers:
Telephone:
800.638.0031 or 714.730.3222 The 800 telephone support line is toll-free in the U.S. and Canada.
Fax:
714.832.9924
A Customer Service Engineer answers technical assistance calls Monday through Friday between 7:30 AM and 5:30 PM, Pacific Time, excluding holidays. At all other times, an on-duty Customer Service Engineer returns technical assistance calls within 30 minutes.
RETURNS To return equipment to ADC Wireline Systems Division: 1
Locate the number of the purchase order under which the equipment was purchased. You will need to provide this number to ADC Wireline Systems Division Customer Service to obtain a return authorization.
2
Call or write ADC Wireline Systems Division Customer Service to ask for a Return Material Authorization (RMA) number and any additional instructions. Use the telephone number, fax number, or email address listed below:
3
•
Telephone: 800.370.9670
•
Fax: 714.832.9923
•
Email Address:
[email protected]
Include the following information, in writing, along with the equipment you are returning: •
Company name, address, and the name of a person Customer Service can contact regarding this equipment.
•
The purchase order number provided to Customer Service when the RMA number was requested.
•
A description of the equipment, as well as the number of units that you are returning. Be sure to include the model and part number of each unit.
•
The shipping address to which Customer Service should return the repaired equipment.
•
The reason for the return:
–
The equipment needs an ECO/ECN upgrade.
–
The equipment is defective. If the equipment is defective, please tell us what you observed just before the equipment malfunctioned. Be as detailed in your description as possible.
–
If there is another reason for returning the equipment, please let us know so we can determine how best to help you.
WorldDSL HDSL Line and Desktop Units
September 14, 2000
103
Appendix D - Product Support
700-804-100-06, Revision 06
4
Pack the equipment in a shipping carton.
5
Write the ADC Wireline Systems Division address and the RMA number you received from Customer Service clearly on the outside of the carton: ADC Wireline Systems Division 14352 Franklin Ave. Tustin, CA 92780-7013 Attention: RMA (Number) Warranty information can be found on the inside back cover of this manual.
104
September 14, 2000
WorldDSL HDSL Line and Desktop Units
700-804-100-06, Revision 06
Appendix E - Abbreviations
APPENDIX E - ABBREVIATIONS AIS
Alarm Indication Signal
LED
Light Emitting Diode
ALM
Alarm
LL
Local Loopback
ANSI
American National Standards Institute
LOC
Local
AWG
American Wire Gage
LOC
Loss of Clock
CAS
Channel Associated Signaling
LOSW
Loss of Sync Word
BER
Bit Error Rate
LPBK
Loopback
C
Centigrade
LTU
Line Termination Unit
COM
Communication
M34F
M-type 34-pin Female Connector
CRC
Cyclic Redundancy Check
MAR
Margin
CTS
Clear To Send
Mbps
Megabits per second
D15F
D-type 15-pin Female Connector
MHz
Megahertz
D25F
D-type 25-pin Female Connector
mm
millimeter
D9F
D-type 9-pin Female Connector
NC
Normally Closed
dB
Decibel
NO
Normally Open
DCE
Data Communications Equipment
NTU
Network Termination Unit
Det
Detector
NVRAM
Non-volatile Random Access Memory
dnl
Download
Nx64k
Number (N) of 64 kbps DS0 time slots mapped to a data port.
DS0
Digital Service, Level 0 (64 kbps)
Op
Operation
DSR
Data Set Ready
PFO
Power Feed Open
DTE
Data Terminal Equipment
PFS
Power Feed Short
DTR
Data Terminal Ready
ppm
pulse per minute
EMC
Electromagnetic Compliance
PRBS
Pseudorandom Bit Sequence
EMI
Electromagnetic Interference
RAM
Random Access Memory
EMS
Exchange Office Management Shelf
REM
Remote
EMU
Exchange Office Management Unit
RL
Remote Loopback
ES
Errored Second
RLSD
Received Line Signal Detector
ETR
ETSI Technical Report
RTS
Ready to Send
ETSI
European Telecommunications Standards Institute
S/W
Software
ETU
ETSI Termination Unit
SD
Transmit Data
EXT
External
ST
Send Timing
H/W
Hardware
SYNC
Synchronization
HDSL
High-bit-rate Digital Subscriber Line
TM
Test Mode
Hz
Hertz
TT
Terminal Timing
I/F
Interface
UAS
Unavailable Seconds
ID
Identification
UTU
Universal Termination Unit
INT
Internal
V
Volts
kbps
kilobytes per second
Vdc
Volts direct current
km
kilometers
VT100
A terminal-emulation system
WorldDSL HDSL Line and Desktop Units
September 14, 2000
105
CERTIFICATION AND WARRANTY DIRECTIVE 89/336/EEC COMPLIANCE To indicate compliance with directive 89/336/EEC as amended by directive 93/68/EEC, most ADC WorldDSL products have been affixed with the CE mark. See the CE declaration on the ADC/PairGain Website for details.
LIMITED WARRANTY ADC DSL Systems, Incorporated (“ADC”) warrants that, for a period of sixty (60) months from the date of shipment, the hardware portion of its products will be free of material defects and faulty workmanship under normal use. ADC's obligation, under this warranty, is limited to replacing or repairing, at ADC's option, any such hardware product which is returned during the 60-month warranty period per ADC's instructions and which product is confirmed by ADC not to comply with the foregoing warranty. ADC warrants that, for a period of 90 days from the date of purchase, the software furnished with its products will operate substantially in accordance with the ADC published specifications and documentation for such software. ADC’s entire liability for software that does not comply with the foregoing warranty and is reported to ADC during the 90-day warranty period is, at ADC’s option, either (a) return of the price paid or (b) repair or replace of the software. ADC also warrants that, for a period of thirty (30) days from the date of purchase, the media on which software is stored will be free from material defects under normal use. ADC will replace defective media at no charge if it is returned to ADC during the 30-day warranty period along with proof of the date of shipment. The transportation charges for shipment of returned products to ADC will be prepaid by the Buyer. ADC will pay transportation charges for shipment of replacement products to Buyer, unless no trouble is found (NTF), in which case the Buyer will pay transportation charges. ADC may use reconditioned parts for such repair or replacement. This warranty does not apply to any product which has been repaired, worked upon, or altered by persons not authorized by ADC or in ADC's sole judgment was subjected to misuse, accident, fire or other casualty, or operation beyond its design range. Repaired products have a 90-day warranty, or until the end of the original warranty period—whichever period is greater. ADC DISCLAIMS ALL OTHER WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, WITH RESPECT TO ITS PRODUCTS AND ANY ACCOMPANYING WRITTEN MATERIALS. FURTHER, ADC DOES NOT WARRANT THAT SOFTWARE WILL BE FREE FROM BUGS OR THAT ITS USE WILL BE UNINTERRUPTED OR REGARDING THE USE, OR THE RESULTS OF THE USE, OF THE SOFTWARE IN TERMS OF CORRECTNESS, ACCURACY, RELIABILITY OR OTHERWISE.
MODIFICATIONS Any changes or modifications made to this device that are not expressly approved by ADC DSL Systems, Inc. voids the user's warranty. All wiring external to the products should follow the provisions of applicable local regulations.
ADC DSL Systems, Inc. 14402 Franklin Avenue Tustin, CA 92780-7013 Tel: 714.832.9922 Fax: 714.832.9924 Technical Assistance 800.638.0031 714.730.3222