Table of Contents LTPH-UM-1031-03, Issue 3
vi September 12, 2003 H4TU-C-319 List 1
System Alarms.................................................................................................................................42
Alarm Option for DLC Feed.............................................................................................44
Retiring System Alarms....................................................................................................44
Remote LOS and AIS Response.......................................................................................45
OCT55 Test Pattern with AMI Line Code......................................................................................45
Loopback Operation........................................................................................................................ 46
Generic Loopback Commands.......................................................................................... 47
Special Loopback Commands...........................................................................................47
Manual Loopback Session................................................................................................48
Loopback Test Procedures.............................................................................................................. 49
General Troubleshooting Tips.......................................................................................... 49
GNLB Test Procedures.....................................................................................................51
A3LB Test Procedure........................................................................................................52
A5LB Test Procedure........................................................................................................53
Testing with H4TU-C BERT Generator..........................................................................................56
Testing with H4TU-R BERT Generator..........................................................................................57
Appendix A - Specifications____________________________________________________________ 58
Power Consumption........................................................................................................................60
Maximum Power Dissipation..........................................................................................................60
Maximum Current Drain.................................................................................................................61
Loop Attenuation, Insertion Loss, and Reach................................................................................. 61
H4TU-C-319 Card-Edge Connector................................................................................................62
Network Management Control Bus.................................................................................. 62
Fuse Alarm........................................................................................................................62
System Alarm Output Pin.................................................................................................63
Craft Port.........................................................................................................................................63
Appendix B - Functional Operation _____________________________________________________ 64
Timing.............................................................................................................................................64
Ground Fault Detection................................................................................................................... 64
Spectrum Issues...............................................................................................................................64
Appendix C - Compatibility____________________________________________________________ 65
Appendix D - Product Support _________________________________________________________ 66
Appendix E - Abbreviations____________________________________________________________ 67
Certification and Warranty____________________________________________ ________________70