Demand test descriptions and error codes - Avaya Support

Figure 78: Synchronization Troubleshooting, Fig. 3 of 5
E
From
Fig 2
Slips on
Reference
Facilities?
5
Are there
many facilities
with excessive slips?
7
B
From
Fig 1
Yes
Is there a
loss-of-signal or
network alarm
on the DS1 references?
No No
Few
Check the overall timing network to
verify the source is traceable back to
the same high stratum level source.
(This does not apply when
slips are only on tie trunk facilities)
Fix any DS1-BD and UDS1-BD
problems present in the system.
Work with the service provider (or distant
switch, if applicable) to compare
administration of line coding, frame
formats, etc.
Verify that one end of a slipping span
is administered to be the master and the
other is administered to be the slave.
If the distant end is another PBX, verify
that one switch is the master and the
other is a slave. If both think they are the
master it will cause slips on all spans
between them.
Consider using the facility fault
sectionalization techniques to isolate
the problem. Use slip counts as a
pass/fail indication.
Perform the following to try and affect the
symptoms:
If duplicated:
- Switch tone clocks
Replace circuit packs:
- IPSI/Tone Clock in the timing master PN.
- DS1 in timing master PN
Many
902 Maintenance Alarms for Communication Manager, Media Gateways and Servers
From
Fig 1
C
6
Are all the facilities
with slips from the
same external
source, i.e.
Network Service
Provider or other
switching vehicle?
Yes
A tone clock is acting as the timing
reference and it was switched to from 12
a higher (primary or secondary)
reference. The primary and, if administered
secondary reference must be restored before
troubleshooting may continue on other spans.
Yes
No
Contact the distant end service provider of the
facilities with slips to troubleshoot.
If the distant end is another PBX, verify that one
switch is the master and the other is a slave. If
both think they are the master it will cause slips on
all spans between them.
See the DS1-BD and
UDS1-BD MOs to resolve
any outstanding alarms.
Investigate external causes
for the loss of the primary
and/or secondary reference.
Change interface boards as
a last resort.
Escalate, if the
problem is not fixed.
D
To Fig 4
6