Lucent Technologies Comcode 108678723 manual Alarming out-of-spec conditions

DEFINITY ECS Release 8.2 ATM Installation,	Issue 1
Upgrades, and Administration 555-233-124	April 2000
6 Troubleshooting
Troubleshooting ATM-PNC	6-45

network occurs. In such cases, SVC setups requested by DEFINITY can be denied by the ATM network and associated components, and calls are not completed.

In this section, a failed SVC setup means that the ATM network has actively rejected the request. A delayed SVC setup means that the SVC setup exceeded a time threshold, specified in milliseconds (ms).

Performance indicators of both failed and delayed SVC setups:

■The called party may hear ringing, take the receiver off-hook, and hear nothing. The called party may eventually receive a delayed call, but never receives a failed call.

■If the call was delayed, the calling party hears silence if one of the SVCs is not up or hears the called party if it is up.

■If the call is never completed, the caller eventually hangs up without knowing why the call was not completed.

Therefore, SVC failures that occur more often than normal are most often evidence of an ATM network that is out of specification.

The tools to manage the DEFINITY ECS switch and the ATM network are

■Alarming out-of-spec conditions

■SVC latency commands

■Administration thresholds to either allow or deny completion of calls that require a new SVC over a path that recently experienced a high number of delayed or failed SVCs.

Alarming out-of-spec conditions

Out-of-spec conditions in the ATM network are reported against the ATM-NTWK maintenance object in the Alarm Report and the Hardware Error Report (display errors). Refer to one of the following books for an example of a Hardware Error Report with an ATM-NTWK alarm:

■DEFINITY Enterprise Communications Server Release 8 Maintenance for R8r

■DEFINITY Enterprise Communications Server Release 8 Maintenance for R8si

■DEFINITY Enterprise Communications Server Release 8 Maintenance for R8csi