Layer 2 Status Test (#647) - Avaya G350 Maintenance Manual

Layer 2 Status Test (#647)

The Layer 2 Status Test checks the layer 2 status of the ISDN-PRI Signaling Channel (D-channel). This
test will fail if there is a hardware failure or a facility problem, or if the primary and secondary ISDN-PRI
D-channels are not administered correctly.
The Primary and Secondary Signaling Link Hardware tests (test 637 and 639) and the Remote Layer 3
Query test (test 637) will detect most problems caused by hardware failures or incorrect administration.
However, the Layer 3 test (test 637) cannot detect end-to-end transmission problems with the Standby D-
channel since Layer 3 messages are not sent on the standby channel.
The SYS-LINK Maintenance Object reports Layer 2 ISDN-PRI D-channel problems. The Layer 2 Query
test is provided to detect D-Channel Layer 2 failures and generate an associated Warning alarm
independent of the hardware configuration used for the D-channels.
Table 85: TEST #647 Layer 2 Status Query Test 1 of 2
Error Test
Code Result
1132 ABORT
1134 ABORT
2500 ABORT
1 FAIL
Maintenance of the Avaya G350 Media Gateway
June 2004
Avaya Communication Manager controlled maintenance
Description/ Recommendation
Internal system error:
The port location for the primary ISDN-PRI D-channel is not known. This
condition should not be possible since an administered DS1 Media Module
must be specified when a Signaling Group is administered:
Retry the command at one minute intervals a maximum of five times.
Internal system error:
The associated DS1 Media Module is not administered. This condition
should not be possible since an administered DS1 Media Module must be
specified when a Signaling Group is administered.
Retry the command at one minute intervals a maximum of three times.
Internal system error:
Retry the command at one minute intervals a maximum of five times.
Layer 2 of the primary signaling channel is down:
Examine the results of the Primary Signaling Test (#636) and follow
recommendations provided there.
If test #636 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. Verify that the Primary Signaling
Channel (D-channel) at the far end has been administered correctly. Verify
that the DS1 port used for the Primary D-channel has not been busied out at
the far end.
ISDN-SGR (ISDN-PRI Signaling Group)
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