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Table of Contents Installation and Operation Manual
ii ASM-40CD Ver. 1.0
Chapter 4. Troubleshooting and Diagnostics
4.1 Loopback Tests..........................................................................................................4-1
Activating Loopback Tests.......................................................................................4-2
Running Loopback Tests .........................................................................................4-2
Local Analog Loopback (LLB)...................................................................................4-2
Remote Digital Loopback (RLB) ...............................................................................4-3
Local Digital Loopback (DIG)....................................................................................4-4
4.2 Internal BERT Circuit Operation...................................................................................4-5
4.3 Setting Loopback and BER Tests.................................................................................4-5
4.4 Viewing Alarm Status .................................................................................................4-7
4.5 Viewing Alarm Buffer Messages..................................................................................4-9
4.6 Troubleshooting.......................................................................................................4-10
Using LEDs............................................................................................................4-10
Using Alarm Messages ..........................................................................................4-10
Using Loopbacks for Troubleshooting....................................................................4-11
Appendix A. IR-ETH Ethernet Card
Appendix B. IR-ETH/QN (IR-ETH/Q) Interface Module
Appendix C. Command List
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