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 desc ription 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 p rotocol 1 (including the US) the Service State Audit
executes in all trunk service state s. A message is sent to the far-end switc h to
ensure that both sides agree on the servi ce state. A PASS for this test simply
means that the message has been suc cessfully sent. Two minutes are allowed
for a reply. If no reply is received within that 2 minute w indow, the message is
sent out again. If that attempt fails, an Error Type 3073 will be log ged and the
switch will attempt another Service State Audit every 15 minute s. If the trunk was
initially in-service, it is plac ed in the maintenance/far-end s tate. No outgoing calls
will be placed over this trunk, but incoming c alls will be accep ted. 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 c ycle, but
tries to recover immediately).
For interfaces not using country p rotocol 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 b een 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 ag ain no response is received within two minutes,
the trunk remains in the out-of-service/far-end sta te. The switch will attempt
another Service State Audit after an hour has passed .
4 FAIL There is a problem with the sig naling 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 pac k
(DS1-BD or UDS1-BD).
PASS The signaling link hardwa r e is OK.
Table 9-372. TEST #255 Signaling Link State Check Test — Continued
Error
Code Test
Result Description/ Recommendation
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