Avaya S8700 Maintenance Manual page 2396

Maintenance-Object Repair Procedures
2. If the error is not corrected by resolving errors found in step 1, the
3. If error 2305 or 3848 persists, all clock signals from the indicated
4. If the error has not been corrected at this point, there is a problem
8-1674 Issue 1 May 2002
IPSI or Tone-Clock circuit pack should be replaced. See
the IPSI or Tone-Clock Circuit
NOTE:
Replacing the circuit pack and retesting it with the test
tone-clock command is not adequate to retire this alarm and
return the IPSI or Tone-Clock circuit pack to full service; the
Clock Health Inquiry test (#46) will continue to fail. Because
the ability to generate clocks was considered lost, once any
repairs have been made it is necessary to execute the set
tone-clock PC override command, forcing the circuit pack to
become active. If the problem has not actually been
corrected, this action may cause a disruption in service for
active digital facilities users.
board were lost.
If the reported Tone-Clock circuit is in a port network with duplicated
Tone-Clocks, the problem may lie with the circuit pack responsible
for selecting the active Tone-Clock circuit (the t/c selector). For an
EPN, the t/c selector is the active EXP-INTF circuit pack.
The t/c selector circuit pack of interest is the one which was active at
the time the error was logged. This is the currently active t/c
selector, unless there has been an EXP-INTF link switch for an EPN
problem. In order to determine whether an interchange has
occurred since the TONE-BD error, examine the display initcauses
log for EXP-LNK entries in the hardware error log for expansion link
interchanges.
If the t/c selector circuit pack was not replaced as part of the
previous step, replace it now. Follow procedures described in
''EXP-INTF (Expansion Interface Circuit Pack)'' on page 8-762
the Expansion Interface.
with the TDM bus within the port network containing the reported
Tone-Clock circuit. This may include TDM bus intercarrier cables,
bus terminators, bent pins on the backplane, and errors on any
circuit pack plugged into the same port network. See
(TDM Bus)'' on page 8-1588.
Pack''.
''Replacing
for
''TDM-BUS
555-233-143