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DEFINITY Enterprise Communications Server Release 5
Maintenance and Test for R5vs/si
555-230-123
Issue 1
April 1997
Maintenance Object Repair Procedures
Page 10-815ISDN-SGR (ISDN-PRI Signaling Group)
10
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
4 FAIL There is a problem with the Processor Interface Link. No DS1 ISDN
Trunk (B-channel) or Wideband PRI Endpoint calls can be made
until the problem is resolved.
1. Display the Communication-Interface Links Form via the
display communication-interface command to determine
which link is down (find the one that matches the DS1 Interface
circuit pack on which this ISDN-PRI Signaling Link Port resides)
and then refer to the PI-LINK Processor Interface Link
Maintenance documentation.
8 FAIL There is a problem with the DS1/UDS1 Interface circuit pack or the
ISDN-PRI Secondary Signaling channel (D-channel). No ISDN
Trunk (B-channel) or Wideband PRI Endpoint calls can be made
until the problem is resolved.
1. Refer to the DS1/UDS1 circuit pack and the ISDN-PRI Signaling
channel (ISDN-LNK/ISDN-PLK) Maintenance documentation.
PASS The basic physical connectivity of the Signaling Group’s Secondary
D-channel is intact and functional. Try this test repeatedly to ensure
the link is up and to uncover any transitory problems.
Table 10-226. TEST #639 Secondary Signaling Link Hardware Check — Continued
Error
Code
Test
Result Description/ Recommendation
Continued on next page