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Table of Contents LTPH-UM-1109-01, Issue 1
vi January 9, 2002 H2TU-C-231 List 2
Testing _____________________________________________________________________________ 40
System Alarms................................................................................................................................. 40
Alarm Option for Digital Loop Carrier (DLC) Feed ........................................................ 41
Retiring System Alarms.................................................................................................... 41
Remote LOS and AIS Response....................................................................................... 42
OCT55 Test Pattern with AMI Line Code ...................................................................................... 42
Loopback Operation........................................................................................................................ 43
Generic Loopback Commands.......................................................................................... 43
Special Loopback Commands........................................................................................... 45
Manual Loopback Session ................................................................................................ 46
Loopback Test Procedures .............................................................................................................. 47
General Troubleshooting Tips .......................................................................................... 47
GNLB Test Procedures ..................................................................................................... 47
A1LB, A2LB, and A5LB Test Procedures ....................................................................... 49
A3LB and A4LB Test Procedures .................................................................................... 51
Testing with H2TU-C BERT Generator.......................................................................................... 52
Testing with H2TU-R BERT Generator.......................................................................................... 53
Appendix A - Specifications____________________________________________________________ 54
Power Consumption ........................................................................................................................ 55
Maximum Power Dissipation.......................................................................................................... 55
Maximum Current Drain ................................................................................................................. 55
Loop Attenuation, Insertion Loss, and Reach ................................................................................. 56
H2TU-C-231 List 2 Card-Edge Connector ..................................................................................... 57
Network Management Control Bus .................................................................................. 57
Fuse Alarm........................................................................................................................ 58
System Alarm Output Pins................................................................................................ 58
Craft Port ......................................................................................................................................... 58
Appendix B - Functional Operation _____________________________________________________ 59
Timing ............................................................................................................................................. 59
Ground Fault Detect ........................................................................................................................ 59
Appendix C - Compatibility____________________________________________________________ 60
Appendix D - Product Support _________________________________________________________ 61
Appendix E - Abbreviations____________________________________________________________ 62
Certification and Warranty______________________________________________ Inside Back Cover
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