Avaya DEFINITY Server CSI Maintenance Manual page 90

Maintenance for CSI systems
FROM
PAGE
1
PROBLEMS MAKING
ERRORS OVER
THE TI FACILITY?
MEASUREMENTS
SYNCHRONIZATION
SOURCE BEEN
SYSTEM SWITCHING
AWAY FROM IT?
SEE SYNC MO
IF PROBLEMS
STILL EXIST,
THEN ESCALATE
Figure 6. Processing of ISDN-PRI Problems (Page 2 of 2)
Troubleshooting PRI Endpoint Problems
The following flowchart,
layered approach when troubleshooting PRI endpoint 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.
90
Issue 5 October 2002
A
ARE
THERE
TRANSIENT
NO
ISDN-PRI
CALLS
END
YES
ARE
THERE BIT
YES
USE LIST
COMMAND
PROVIDER. THEN ESCALATE
NO
HAS A
YES
UNSTABLE?
NO
Figure 7 on page 91
COMPARE INDICATED
FACILITY TO RECORD
OF PREVIOUS PROBLEMS
ARE BIT
ERRORS OCCURRING
YES
MORE FREQUENTLY
THAN PREVIOUS
HISTORY
NO
RECORD INDICATED
FACILITY AND, IF THIS
CONTINUES TO OCCUR,
CONTACT FACILITY OR
EXTERNAL EQUIPMENT
SEE DS1-BD MO FOR
REPAIR PROCEDURES IF
SYNC PROBLEM IS DUE
TO SLIPS. OTHERWISE,
FOLLOW REPAIR
PROCEDURES FOR
SYNC MO
and Figure 8 on page
PERFORM AN IN-DEPTH
ANALYSIS OF T1
FACILITY INCLUDING:
TRANSMISSION FACILITY,
EXTERNAL EQUIPMENT
(DACS, CSUs, ETC.,)
AND ANY OTHER
NOISE-PRODUCING
EQUIPMENT.
REFER TO AT&T PRACTICE
855-351-101 ISSUE 8,
JANUARY 1987. THIS
DESCRIBES T1 CABLING TO
CSUs, ETC, IN DETAIL
END
92, defines a
555-233-119