PairGain HLU-231 User manual

HIGAIN LINE UNIT
PAIRGAIN TECHNOLOGIES, INC.
ENGINEERING SERVICES TECHNICAL PRACTICE
150-231-108-04
Model List Number Part Number CLEI Code
HLU-231 8 150-1111-08 T1L2FY0A
R
S
2
3
2
L
MARGIN
STATUS
BRG
SPAN
XMT
RCV
BRG
SPAN
dB
HLU 231
H G LINE UNIT
IAIN
HDSL
MODE
8
D
S
X
1
SEL
PairGain

150-231-108-04, Revision 04
ii August 13, 1999 HLU-231 List 8
Revision History of This Practice
© Copyright 1999 PairGain Technologies, Inc.
PairGain andHiGain areregistered trademarks of PairGain Technologies, Inc. All other product namesmentionedin this practice
are used for identification purposes only and may be trademarks or registered trademarks of their respective companies.
Information contained in this document is company private toPairGain Technologies, Inc., and shall not be modified, used, copied,
reproduced or disclosed in whole or in part without the written consent of PairGain.
Information furnished by PairGain Technologies is believed to be accurate and reliable. However, no responsibility is assumed by
PairGain Technologies for its use; nor for any infringement of patents or other rights of third parties which may result from its use.
No license is granted by implication or otherwise under any patent or patent rights of PairGain Technologies. PairGain
Technologies reserves the right to change specifications at any time without notice.
Revision Release Date Revisions Made
01 October 3, 1997 Initial release
02 June 10, 1998 Modified alarm diagnostics, miscellaneous edits
03 April 15, 1999 New diagnostic messages added
04 August 13, 1999 Troubleshooting screens added

150-231-108-04, Revision 04 Using This Technical Practice
HLU-231 List 8 August 13, 1999 iii
USING THIS TECHNICAL PRACTICE
The following conventions are used in this manual:
•Monospace type indicates screen text, including text you type at a screen prompt.
•Keys you press are indicated by small icons such as . Key combinations to be pressed simultaneously
are indicated with a plus sign as follows: + .
•Three types of messages, identified by icons, appear in text.
For a list of abbreviations used in this document, refer to “Appendix E - Glossary” on page 65.
DOCUMENTATION
If you have comments on this PairGain document, send an email to [e-mail]. Type
the product name and the section number of the document in the subject area of the email message.
INSPECTING THE 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 PairGain. 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 PairGain as described in the Warranty located inside the back cover. If you must store
the equipment for a prolonged period, store the equipment in its original container.
Notes contain information about special circumstances.
Cautions indicate the possibility of equipment damage or personal injury.
The Electrostatic Discharge (ESD) Susceptibility symbol indicates that a device or assembly is
susceptible to damage from electrostatic discharge.
(17(5
&75/
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Inspecting the Shipment 150-231-108-04, Revision 04
iv August 13, 1999 HLU-231 List 8

150-231-108-04, Revision 04 Table of Contents
HLU-231 List 8 August 13, 1999 v
TABLE OF CONTENTS
Overview ____________________________________________________________________________ 1
Features..............................................................................................................................................1
Product Enhancements ........................................................................................................1
Standard Features ................................................................................................................1
Compatibility .....................................................................................................................................2
Applications .......................................................................................................................................2
HiGain Doubler Applications..............................................................................................2
Personal Communications System Applications.................................................................3
Front Panel __________________________________________________________________________ 4
Installation___________________________________________________________________________ 8
Verification ........................................................................................................................................9
Verification without a Downstream Device........................................................................9
Verification with a Downstream Device .............................................................................9
Provisioning Requirements..............................................................................................................10
Provisioning_________________________________________________________________________ 11
Using the MODE and SEL Buttons.................................................................................................11
Setting Options through MODE and SEL.........................................................................11
Resetting to Factory Default Values..................................................................................12
Displaying System Parameter Settings..............................................................................12
Disabling an Alarm............................................................................................................12
Loopback Modes ...............................................................................................................12
Using a Maintenance Terminal........................................................................................................13
Connecting to a Maintenance Terminal.............................................................................13
Accessing the Maintenance Terminal Screens..................................................................13
Navigation Keys..................................................................................................13
Maintenance Terminal Main Menu.....................................................................14
Selecting a Maintenance Terminal Function.......................................................15
System Spans.......................................................................................................15
Using the Maintenance Terminal Screens .......................................................................................15
View Span Status Screen...................................................................................................15
Span Status Screen without Doublers .................................................................16
Span Status Screen for Doubler Applications.....................................................16
Set Clock Screen................................................................................................................19
Set Time ..............................................................................................................19
Set Date...............................................................................................................19
Update the HRU Time and Date.........................................................................19

Table of Contents 150-231-108-04, Revision 04
vi August 13, 1999 HLU-231 List 8
System Settings Screen..................................................................................................... 20
Equalization Option............................................................................................ 23
BPVT Option...................................................................................................... 23
BER Option ........................................................................................................ 24
DS0 Blocking Option ......................................................................................... 24
DS1 Line Code Option....................................................................................... 24
Margin Alarm Threshold Option........................................................................ 25
HAIS Option....................................................................................................... 25
HDSL Line Voltage Options.............................................................................. 25
Loopback Mode Screen .................................................................................................... 26
Loopback Menu without Doubler....................................................................... 27
Loopback Menu for Doubler Applications......................................................... 27
Initiating a Loopback.......................................................................................... 28
Disabling a Loopback......................................................................................... 28
View Performance Data Screen........................................................................................ 29
Performance Data Screen without Doubler........................................................ 30
Performance Data Screen for Doubler Applications.......................................... 30
View Performance History Screen.................................................................................... 31
Performance History Screen without Doubler.................................................... 31
Performance History Screen for Doubler Applications...................................... 32
View Alarm History Screen.............................................................................................. 33
Alarm History Screen without Doubler.............................................................. 34
Alarm History Screen for Doubler Applications................................................ 34
View System Inventory Screen......................................................................................... 35
System Inventory Screen without Doubler......................................................... 36
System Inventory Screen for Doubler Applications........................................... 36
View Troubleshooting Screen........................................................................................... 37
Troubleshooting _____________________________________________________________________ 40
System Alarms................................................................................................................................. 40
Alarm Option for DLC Feed............................................................................................. 41
Retiring System Alarms.................................................................................................... 41
Self Test ............................................................................................................................ 41
Loopback Operation........................................................................................................................ 42
Generic Loopback Commands.......................................................................................... 42
Special Loopback Commands........................................................................................... 44

150-231-108-04, Revision 04 Table of Contents
HLU-231 List 8 August 13, 1999 vii
Initiating a Manual Loopback Session ..............................................................................45
Setting the Loopback Time-out Option...............................................................45
Initiating a Manual Loopback Session................................................................45
Loopback Test Procedures...............................................................................................................46
General Troubleshooting Tips...........................................................................................46
GNLB Test Procedures......................................................................................................46
A1LB, A2LB, and A5LB Test Procedures........................................................................48
A3LB and A4LB Test Procedures.....................................................................................51
Appendix A - Specifications____________________________________________________________ 52
HDSL Insertion Loss Guidelines.....................................................................................................53
Power Consumption.........................................................................................................................53
Power Consumption without Doublers..............................................................................53
Power Consumption with Doublers...................................................................................54
Maximum Power Dissipation...........................................................................................................56
Maximum Current Drain..................................................................................................................56
HLU-231 List 8 Card Connector .....................................................................................................57
Network Management Control Bus...................................................................................57
Fuse Alarm ........................................................................................................................57
System Alarm Relay Output..............................................................................................58
Craft Port..........................................................................................................................................58
Appendix B - Functional Operation _____________________________________________________ 59
Timing..............................................................................................................................................59
Ground Fault Detect.........................................................................................................................60
Appendix C - Compatibility ___________________________________________________________ 61
T1 Repeater Shelves and Related Equipment..................................................................................61
HiGain Doubler Circuit Deployment...............................................................................................61
Appendix D - Product Support _________________________________________________________ 63
Technical Support............................................................................................................................63
World Wide Web.............................................................................................................................63
Returns.............................................................................................................................................63
Appendix E - Glossary ________________________________________________________________ 65
Certification and Warranty_______________________________________________ Inside Back Cover

List of Figures 150-231-108-04, Revision 04
viii August 13, 1999 HLU-231 List 8
LIST OF FIGURES
1. HLU-231 List 8 Front Panel........................................................................................................................... 4
2. Installing the HLU-231 List 8 into a Shelf ..................................................................................................... 8
3. Maintenance Terminal Main Menu .............................................................................................................. 14
4. System Spans................................................................................................................................................ 15
5. Span Status Screen: No Doubler................................................................................................................... 16
6. Span Status Screen: Four Doublers (Span 5)................................................................................................ 16
7. Set Clock Screen........................................................................................................................................... 19
8. System Settings Screen................................................................................................................................. 20
9. Loopback Menu: No Doubler....................................................................................................................... 27
10. Loopback Menu: Four Doublers................................................................................................................... 27
11. NLOC Loopback Mode Reported in the Maintenance Terminal Main Menu.............................................. 28
12. Performance Data Screen: No Doubler......................................................................................................... 30
13. Performance Data Screen: Four Doublers (Span 5)...................................................................................... 30
14. 31-Day Performance History Screen: No Doubler....................................................................................... 31
15. 31-Day Performance History Screen: Four Doublers (Span 5).................................................................... 32
16. Alarm History Screen: No Doubler.............................................................................................................. 34
17. Alarm History Screen: Four Doublers (Span 5) ........................................................................................... 34
18. System Inventory Screen: No Doubler......................................................................................................... 36
19. System Inventory Screen: Four Doublers..................................................................................................... 36
20. Troubleshooting Screen for a Doubler Application...................................................................................... 37
21. Troubleshooting Screen Describing Circuit Problem................................................................................... 37
22. Troubleshooting with Help........................................................................................................................... 38
23. Troubleshooting with Margin Values........................................................................................................... 39
24. Troubleshooting with Insertion Loss Values................................................................................................ 39
25. Loopback Summary...................................................................................................................................... 42
26. Loopback Configurations ............................................................................................................................. 47
27. HLU-231 List 8 Card-edge Connector ......................................................................................................... 57
28. RS-232 Craft Port Pinouts ............................................................................................................................ 58
29. HLU-231 List 8 Block Diagram................................................................................................................... 59

150-231-108-04, Revision 04 List of Tables
HLU-231 List 8 August 13, 1999 ix
LIST OF TABLES
1.Front-panel Description....................................................................................................................................5
2.Front-panel Display Messages .........................................................................................................................6
3.Navigational Keys on the Maintenance Terminal..........................................................................................13
4.Maintenance Terminal Screens ......................................................................................................................14
5.Span Status Fields and Descriptions...............................................................................................................17
6.HDSL System Alarms....................................................................................................................................18
7.Loopback Messages........................................................................................................................................18
8.HLU-231 List 8 System Settings....................................................................................................................21
9.Loopback Field Messages and Descriptions ..................................................................................................26
10.Errored and Unavailable Seconds Definitions ...............................................................................................29
11.Alarm History Fields and Descriptions..........................................................................................................33
12.HDSL System Alarms....................................................................................................................................40
13.Summary of HiGain Loopback Codes ...........................................................................................................43
14.Addressable Repeater Loopback Commands (A1LB, A2LB, A5LB)...........................................................48
15.Addressable Repeater Loopback Commands (A3LB and A4LB) .................................................................51
16.HDSL Loss Over Cables................................................................................................................................53
17.HLU-231 Power Parameters—No Doubler....................................................................................................53
18. HLU-231 Power Parameters—Single Doubler (HDU-451 List 1 or 2)........................................................54
19.HLU-231 Power Parameters—Single Doubler (HDU-439 or HDU-437 Lists 1 and 1B).............................54
20.HLU-231 Power Parameters—Single Doubler (HDU-409 List 2) ................................................................54
21.HLU-231 Power Parameters—Two Doublers (HDU-451 List 3, 4, 3B or 4B).............................................55
22.HLU-231 Power Parameters—Two Doublers (HDU-439 or HDU-437 Lists 1 and 1B) ..............................55
23.HLU-231 Power Parameters—Two Doublers (HDU-409 List 2)..................................................................55
24.HLU-231 Power Parameters—Three and Four Doublers (HDU-409 List 2) ................................................55
25.HiGain Doubler Deployment Matrix..............................................................................................................62

List of Tables 150-231-108-04, Revision 04
x August 13, 1999 HLU-231 List 8