Zhone Technologies 600 - Manual (Page 149)

Server Cards 5-39
ISDN-PRI Card ISDN-PRI Card Troubleshooting
Note: When changing configuration settings on the ISDN-PRI card, set STATE to conf (for
“configure”), make changes and then set STATE to actv. Selecting stdby will cause
the configuration information for that D-channel to return to the default parameters.
4. The Call Status Screen will indicate if any calls are currently connected through the
ISDN-PRI card. Review the Call Status Screen to determine if calls from any of the
ISDN ports are currently active. Generate calls through the ISDN-PRI card and review
the performance register information (accessed by pressing P from the ISDN-PRI Main
Screen) for the affected D-channel(s). This will assist is determining the extent and
possible cause of call failures (error disconnects, call attempt, call rejected, etc.). Many
configuration parameters can affect an ISDN call. Verify that all configuration options
(routing, B-channel assignment and status, etc.) are correct before proceeding.
Note: When changing configuration settings on the ISDN-PRI card, set STATE to conf (for
“configure”), make changes and then set STATE to actv. Selecting stdby will cause
the configuration information for that D-channel to return to the default parameters.
5. If an HSU card is being used to originate or receive ISDN calls, additional circuit tests
can be performed. Once an end-to-end call is established, use the loopback and test
signal functions of the HSU card to test the affected port. These tests are accessible
from the HSU Card Main Screen and associated Test Screen, as described in the HSU
chapter. They allow you to test the end-to-end circuit path for that call.
6. If the ISDN-PRI card is determined to be faulty, replace it and return the faulty unit for
repair to the location specified by your distributor.