Avaya DEFINITY Server CSI Maintenance Manual page 756

Maintenance Objects
Remote Layer 3 Query (#1291)
This test queries the far-end switch or terminal adapter to determine if the
signaling connection is functioning properly at Layer 3. It selects a B-channel in
the in-service or maintenance service state and sends an ISDN Layer 3 SERVice
message, which requires a response from the far end (similar to performing Test
#256 on an ISDN trunk). The test is not performed if there are no B-channels in an
appropriate ISDN service state (for example, when none are administered or they
are all out of service).
NOTE:
The service state can be displayed by using the status trunk <trunk
group/trunk member> or status pri-endpoint command.
As is the case with Test #256 for an ISDN trunk, a PASS only indicates that a
message was composed and sent to the far-end switch or terminal adapter. The
ISDN PRI Specification allows up to 2 minutes for a response. Check the Error
Log for ATM-SGRP errors of type 2305 for evidence of a Remote Layer 3 Query
failure.
Test #636 checks the health of the D-channels and ATM Interface Circuit Packs.
This test goes one step further by checking the communication path from the
processor, through the TDM/Packet Bus and ATM Interface circuit pack, and on to
the far-end switch or terminal adapter. A special ISDN message is sent to the
far-end switch or terminal adapter, which must respond within a specified amount
of time. This test is designed to ensure that the communication path between the
switch and the far-end is up and operational, and that the two endpoints can
properly exchange ISDN control messages.
Table 86. TEST #1291 Remote Layer 3 Query
Error Test
Code Result
1006 ABORT There are no associated B-channels in an ISDN "in-service" or
"maintenance" service state. This is a NORMAL ABORT.
1113 ABORT The signaling channel is down. Therefore, no messages can be sent to the
far-end switch or terminal adapter.
756
Issue 5 October 2002
Description/Recommendation
1. Administer or release an ISDN trunk or PRI endpoint before retrying the
test. For an ATM trunk, use the status trunk grp#/mbr# command to
verify the ISDN trunk state.
2. Retry this test when at least one B-channel is in the "in-service" or
"maintenance" states.
1. Examine the results of Tests #636 and follow recommendations provided
there.
Continued on next page
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