DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126 Issue 4
June 1999
Alarms, Errors, and Troubleshooting

5-68Troubleshooting ISDN-PRI Problems

5
Figure 5-39. Troubleshooting ISDN-PRI (Page 2 of 2)
PAGE
YES
END
A
FROM
1
ARE
THERE
TRANSIENT
PROBLEMS MAKING
ISDN-PRI
ARE
THERE BIT
ERRORS OVER
HAS A
SYNCHRONIZATION
SOURCE BEEN
SYSTEM SWITCHING
IF PROBLEMS
STILL EXIST,
THEN ESCALATE
COMPARE INDICATED
FACILITY TO RECORD
OF PREVIOUS PROBLEMS
ARE BIT
ERRORS OCCURRING
MORE FREQUENTLY
THAN PREVIOUS
RECORD INDICATED
FACILITY AND, IF THIS
CONTINUES TO OCCUR,
CONTACT FACILITY OR
EXTERNAL EQUIPMENT
PROVIDER. THEN ESCALATE
THE TI FACILITY?
UNSTABLE?
AWAY FROM IT?
NO
YES
SEE UDS1-BD OR DS1-BD
MO FOR REPAIR PROCEDURES
IF SYNC PROBLEM IS DUE
TO SLIPS. OTHERWISE,
FOLLOW REPAIR
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
YES
NO
NO
NO
YES
END
CALLS
SEE SYNC MO
HISTORY
PROCEDURES FOR
SYNC MO
USE LIST
MEASUREMENTS
COMMAND