ISDN-SGR (ISDN-PRI Signaling Group)
Issue 4 May 2002
10-975555-233-123
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 636 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.
For G3r, the SYS-LINK Maintenance Object reports Layer 2 ISDN-PRI D-channel
problems and for G3i/s/vs, the PI-LINK Maintenance Object reports Layer 2
ISDN-PRI D-channel problems (if the D-channel is connected to the Processor
Interface circuit pack). However, the PI-LINK Maintenance Object does not
monitor the Layer 2 status of the ISDN-PRI D-channel when the D-channel is
connected to the Packet Control circuit pack for the ISDN-PRI over PACCON
feature. 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 10-353. TEST #647 Layer 2 Status Query Test
Error
Code
Te s t
Result Description/Recommendation
1132 ABORT 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 circuit pack must be specified when a
Signaling Group is administered:
1. Retry the command at 1-minute intervals a maximum of 5
times.
1134 ABORT Internal system error
The associated DS1 circuit pack is not administered. This
condition should not be possible since an administered DS1
circuit pack must be specified when a Signaling Group is
administered.
1. Retry the command at 1-minute intervals a maximum of 3
times.
2500 ABORT Internal system error
1. Retry the command at 1-minute intervals a maximum of 5
times.
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