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 l ayered approach when troub leshooting PRI
endpoint proble ms. Because problems at low er layers affect upper lay ers, layers
are investigated from low to high. I n this procedure, the DS1 facility i s layer 1, the
TN1655 Packet Interface is layer 2, and the PRI endpoint p orts are layer 3.
The troubleshooting proced ure described here is limited to diagnosing faults
between the switch and the line-si de PRI terminal adapter or ISDN-PRI endpoint
equipment. Problems encountered on the network-side of a wideb and
connection or prob lems with end-to-end eq uipment comp atibility are beyond the
scope of this section.