DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126
Issue 4
June 1999
Alarms, Errors, and Troubleshooting
5-69Troubleshooting ISDN-PRI Endpoints (Wideband)
5
Troubleshooting ISDN-PRI Endpoints
(Wideband)
The following flow chart defines a layered approach when troubleshooting PRI
endpoint problems. Because problems at lower layers affect upper layers, layers
are investigated from low to high. In this procedure, the DS1 facility is layer 1, the
TN1655 Packet Interface is layer 2, and the PRI endpoint ports are layer 3.
The troubleshooting procedure described here is limited to diagnosing faults
between the switch and the line-side PRI terminal adapter or ISDN-PRI endpoint
equipment. Problems encountered on the network-side of a wideband
connection or problems with end-to-end equipment compatibility are beyond the
scope of this section.
