Avaya S8700 Maintenance Manual page 1725

ISDN-TRK (DS1 ISDN Trunk)
Service State Audit (#256)
As noted in the general description for DS1 ISDN Trunk, these trunks may be in
one of several service states. This test performs a Service State Audit with the
far-end switch.
For interfaces using country protocol 1 (including the US) the Service State Audit
executes in every trunk service state. A message is sent to the far-end switch to
ensure that both sides agree on the service state. A PASS for this test simply
means that the message has been successfully sent. Two minutes are allowed
for a reply. If no reply is received within that 2-minute window, the message is
sent out again. If that attempt fails, an Error Type 3073 will be logged and the
switch will attempt another Service State Audit every 15 minutes. If the trunk was
initially in service, it is placed in the maintenance/far-end state. No outgoing calls
will be placed over this trunk, but incoming calls will be accepted. If an incoming
call is presented with the trunk in such a state, a Service State Audit is
immediately be attempted (the switch does not wait for the 15-minute cycle, but
tries to recover immediately).
For interfaces not using country protocol 1, the Service State Audit executes only
if the trunk is in the out-of-service/far-end state. A message is sent to the far-end
switch to attempt to bring the trunk back into the in-service state. A PASS for this
test simply means that the message has been successfully sent. Two minutes are
allowed for a reply. If no reply is received within that 2-minute window, the
message is sent out again. If again no response is received within two minutes,
the trunk remains in the out-of-service/far-end state. The switch will attempt
another Service State Audit after an hour has passed.
To investigate the service state of the DS1 ISDN Trunk, issue the status trunk
group#/member# command.
Table 8-398. Test #256 Service State Audit Test
Error Test
Code Result Description / Recommendation
1000 ABORT Resources required to run this test were not available. The port may be on a
valid call or initializing. Use status station or status trunk to determine when
the trunk is available for testing. Check the results of Test #255.
1018 ABORT Maintenance is disable on this trunk.
1. Enable maintenance by entering ''y'' in the ''Maintenance Tests?'' field on
1113 ABORT The signaling link has failed, so the system cannot send any messages on
behalf of this trunk.
1. Check the results of Test #255 and consult procedures for
555-233-143
page 2 of the change trunk-group form.
(ISDN-PRI Signaling Group)'' in this chapter.
Continued on next page
Issue 1 May 2002
''ISDN-SGR
8-1003