Avaya S8700 Maintenance Manual page 144

Alarms, Errors, and Troubleshooting
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 4-39. Troubleshooting ISDN PRI (Page 2 of 2)
4-70 Issue 1 May 2002
A
ARE
THERE
TRANSIENT
NO
ISDN-PRI
CALLS
END
YES
ARE
THERE BIT
YES
USE LIST
COMMAND
NO
HAS A
YES
UNSTABLE?
NO
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
PROVIDER. THEN ESCALATE
SEE UDS1-BD OR DS1-BD
MO FOR REPAIR PROCEDURES
IF SYNC PROBLEM IS DUE
TO SLIPS. OTHERWISE,
FOLLOW REPAIR
PROCEDURES FOR
SYNC MO
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
555-233-143