DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126
Issue 4
June 1999
Maintenance Object Repair Procedures
9-968ISDN-TRK (DS1 ISDN Trunk)
9
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 all trunk service states. 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 two 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.
4 FAIL There is a problem with the signaling channel.
1. Consult the procedures for the ISDN-PRI Signaling Group (ISDN-SGRP).
Further information may also be obtained by consulting the procedures for
the ISDN-PRI Signaling Channel (ISDN-LNK).
8 FAIL There is a problem with the DS1 interface circuit pack.
1. Consult the procedures for the appropriate DS1 interface circuit pack
(DS1-BD or UDS1-BD).
PASS The signaling link hardware is OK.
Table 9-372. TEST #255 Signaling Link State Check Test — Continued
Error
Code
Te s t
Result Description/ Recommendation
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