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

5-70Troubleshooting ISDN-PRI Endpoints (Wideband)

5
START
↓
Are there alarms or errors against any
of the following maintenance objects:
UDS1-BD PKT-INT SYS-L INK
ISDN-LNK ISDN-SGR PE-BCHL
YES
→
Resolve those alarms or errors in the order
listed at left by following procedures for the
appropriate maintenance object in Chapter
9.
↓ NO
Check out the status of the endpoint
equipment or Terminal Ad ap tor. Do
this at the endpoint, not at the G3-MT
on the switch. Does the adaptor or
endpoint indicate problems?
YES
→Follow repair procedures recommended by
the provider of the Terminal Ad apter or
endpoint equipment.
↓ NO
Check administration at the endpoint
and on the switch (for example, port
boundary width). Are they
inconsistent?
YES
→Correct the administration so that both ends
match.
↓ NO
Does every call fail or are the failures
transient?
↓ Transient Failures
Always
Fails
→
Check the health of the application
equipment (for example, the video codec)
and that of the DEFINITY network. If constant
failures persist, follow normal escalation
procedures.
Use list measurements ds1 to check
for bit errors over the DS1 interface
between the switch and the terminal
adapter or endpoint equipment.
↓ No bit errors
Bit
Errors
→
Perform an in-depth analysis of the DS1
interface including premises distribution
wiring, endpoint equipment, and any other
possible source of noise. If the problem
cannot be isolated, follow normal escalation
procedures.
Check for alarms and errors against
SYNC. Has a synchronization source
been unstable? Has the system
switched synch sources?
YES
→Follow procedures described in SYNC in
Chapter 9.
↓ NO
Follow normal escalation procedures.