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ISDN-TRK (DS1 ISDN Trunk)
Issue 1 June 2005 1465
Call State Audit Test (#257)
If a call is active on the trunk, 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 switch as to 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 switch, then the call will be 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 switch. The ISDN Specification allows up to 2 minutes
for a reply. If a reply is not received within the 2-minute window, a protocol time-out violation will
be recorded in the error log against the associated signaling channel (ISDN-LNK, Error Type 1).
Table 529: Test #257 Call State Audit Test
Error
Code
Test
Result
Description / Recommendation
1018 ABRT Maintenance is disabled on this trunk.
1. Enable maintenance by entering y in the Maintenance Tests field
on the change trunk-group form.
1019 ABRT An audit is already in progress.
1. Wait 2 minutes and try again.
1113 ABRT The signaling link has failed, so the system cannot send any messages on
behalf of this trunk.
1. Check the results of Test #255 (Signaling Link State Check).
1114 ABRT The signaling link is in a transitional state.
1. Retry the command at 1-minute intervals up to 5 times.
1116 ABRT The trunk is in an out-of-service ISDN service state.
1. A call cannot be present if the trunk is in an ISDN out-of-service state,
so a call state audit would be inappropriate. No action necessary. Use
status trunk grp#/mem# to investigate the ISDN state of the
trunk.
2100 ABRT Could not allocate the necessary system resources to run this test.
1. Retry the command at 1-minute intervals up to 5 times.
FAIL Internal system error
1. Retry the command at 1-minute intervals up to 5 times.
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