Avaya DEFINITY Server CSI Maintenance Manual page 89

Troubleshooting Features
Troubleshooting ISDN-PRI Problems
The following flowchart,
approach when troubleshooting ISDN-PRI problems. Since a problem at a lower
layer affects upper layers, layers are investigated from low to high. In the
flowchart, the DS1 facility is layer 1, the TN765 Processor Interface is layer 2, and
the ISDN trunks are layer 3. Transient problems are diagnosed on Page 2 of the
flowchart, Figure 6 on page
PI-BD, PI-PT, PI-SCI,
PAGE
Figure 5. Processing of ISDN-PRI Problems (Page 1 of 2)
555-233-119
Figure 5 and
90.
START
ARE THERE
YES
ALARMS OR
ERRORS AGAINST
DS1-BD
NO
ARE THERE
ALARMS OR
ERRORS AGAINST
PI-LINK, OR
ISDN-LINK
NO
ARE THERE
YES
ALARMS OR
ERRORS AGAINST
ISDN-TRK
NO
TO
A
2
Figure 6 on page 90, defines a layered
DETERMINE PRESENT
STATUS OF DS-1 FACILITY
VIA DS1-BD MO SECTION.
FOLLOW REPAIR PROCEDURES
IF MULITPLE ALARMS EXIST,
INVESTIGATE IN FOLLOWING
ORDER:
PI-BD
YES
PI-PT
PI-SCI
PI-LINK
ISDN-LINK
FOLLOW REPAIR PROCEDURE
FOR APPROPRIATE MO
FOLLOW REPAIR
PROCEDURE FOR ISDN-TRK
Issue 5 October 2002
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