Trunk Errors - AT&T MERLIN LEGEND Release 3.0 Installation Manual

Central Office Problems
If you have tested the telephones and the modules in the control unit, you
have isolated the trouble to the trunks or the CO. To isolate the trouble further,
follow the instructions in this chapter to troubleshoot the trunks. If the trouble
persists after following these instructions, the customer should contact the CO
and ask a representative to troubleshoot from that end.

Trunk Errors

The system records errors not only for trunks, but for T1 ports on the 100D
module as well. In some cases, errors occur not because a single port fails,
but because the entire T1 link fails. When this happens, 100D automatic
testing activates an alarm.
Troubleshooting Trunk Problems
Table 5-1 provides a quick guide to troubleshooting trunks.
5
Central Office Problems 5–1