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Communication Manager Maintenance-Object Repair Procedures
2152 Maintenance Procedures for Avaya Communication Manager 3.0, Media Gateways and Servers
Figure 127: Synchronization Troubleshooting, Fig. 3 of 5
5
Slips on
Reference
Facilities?
Is there a
loss-of-signal or
network alarm
YesYes
No No
Many
Are there
many facilities
with excessive slips?
Few
7
Escalate, if the
problem is not fixed.
6
B
D
6
C
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
Are all the facilities
with slips from the
same external
source, i.e.
Network Service
Provider or other
switching vehicle?
No
Yes
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.
To Fig 4
Check the overall timing network to
verify the source is traceable back to
the same high stratum level source.
(This does not apply when
Fix any DS1-BD and UDS1-BD
problems present in the system.
Verify that one end of a slipping span
is administered to be the master and the
other is administered to be the slave.
Consider using the facility fault
sectionalization techniques to isolate
the problem. Use slip counts as a
pass/fail indication.
E
A tone clock is acting as the timing
reference and it was switched to from
a higher (primary or secondary)
reference. The primary and, if administered
Work with the service provider (or distant
administration of line coding, frame
formats, etc.
slips are only on tie trunk facilities)
switch, if applicable) to compare
secondary reference must be restored before
troubleshooting may continue on other spans.
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.
From
Fig 2
From
Fig 1
From
Fig 1
on the DS1 references?
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.
12