Avaya DEFINITY Server CSI Maintenance Manual page 1452

Maintenance Objects
Table 385. TEST #256 Service State Audit Test — Continued
Error Test
Code Result
PASS
Call State Audit Test (#257)
If a call is active on the port, the switches on both sides of the connection should
agree on the ISDN state of the call as defined in the ISDN Protocol Specification.
This test audits internal call state data by querying the far-end terminal adapter
about the ISDN state of the call. It can be helpful when trying to clear a hung call.
If the internal call state data on the near-end switch is different than that of the
far-end terminal adapter, the call is torn down.
As with Test #256 (Service State Audit), a PASS simply means that an appropriate
message was composed and sent to the far-end terminal adapter. The ISDN
Specification allows up to two minutes for a reply. If a reply is not received within
the two minute window, a protocol time-out violation is recorded in the error log
against the associated signaling channel (ISDN-PRI Signaling Link Port, which is
listed in the Error Log as ISDN-LNK; the Error Type is 1).
1452
Issue 5 October 2002
Description/Recommendation
Wait 4 minutes and then check the Error Log for any new occurrences of
Errors Type 3073.
If there are no occurrences of this error, both sides of the ISDN connection
agree on the service state, and the negotiation succeeded. If there is a new
occurrence of Error Type 3073, the negotiation failed (that is, the far-end
terminal adapter twice failed to respond within the mandatory two minute
window). This switch automatically retries approximately every 15 minutes.
If the port was initially in the INS (in-service) state, it is now be placed into
the MTC/FE (maintenance, far-end problem) state. Incoming calls are
accepted, but no outgoing calls are originated from this port. If an incoming
call is presented, another Service State Audit is immediately performed in
an attempt to bring the PRI Endpoint Port to the proper state.
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