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DEFINITY ECS Release 8.2 Maintenance for R8.2csi
555-233-119 Issue 1
April 2000
Maintenance Objects
3-218ATM-SGRP (ATM Signaling Group)
3
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
3 FAIL The D-Channel is down.
1. Examine the results of the Primary Signaling Link Hardware Check
(#636) and follow recommendations provided there.
2. If Test #636 (Primary Signaling Link Hardware Check) passes, the Layer
2 Query test may still fail if the Signaling Channel at the far end has not
been administered correctly or if the Signaling Channel has been
busied out.
3. Verify that the Signaling Channel (D-channel) at the far end has been
administered correctly.
4. Verify that the ATM-DCH port used for the Primary and Secondary
D-channels has not been busied out at the far end.
PASS The Primary Signaling Channel is up.
Table 3-91. TEST #647 Layer 2 Status Query Test — Continued
Error
Code
Test
Result Description/ Recommendation
Continued on next page