DEFINITY Enterprise Communications Server Release 7
Maintenance for R7r
555-230-126
Issue 4
June 1999
Maintenance Object Repair Procedures
9-1706TDM-BUS (TDM Bus)
9
pack at a time. This option is slower, but it disrupts only the users of a single
circuit pack.
1. Remove one or several circuit packs as appropriate. Any circuit packs that
reside on the TDM Bus that have been recently inserted should be
checked first.
If you decide to remove multiple circuit packs, consider working with an
entire carrier at a time to more quickly and reliably determine which circuit
packs are
not
the source of trouble.
2. Run
test tdm P
to determine if the TDM Bus fault is still present.
3. If any of the TDM Bus tests fail:
■ Determine if the backplane pins in the removed circuit pack’s slot
appear to be bent.
■ If the backplane pins are not bent, reinsert the circuit pack(s), and
perform Procedure 2 for the next set of circuit packs.
■ If the backplane pins are bent, remove power to this carrier in the
manner described previously.
■ Straighten or replace the pins and reinsert the circuit pack.
■ Restore power and repeat Procedure 2, beginning with Step 2, for
the same circuit pack(s).
4. If none of the TDM Bus tests fail:
■ Reinsert the circuit pack(s)
one at a time,
and repeat the following
substeps until all of the circuit packs have been reinserted.
■ Run
test tdm P
to determine if the TDM Bus fault has returned.
■ If any of the TDM Bus tests fail, the reinserted circuit pack is
defective. Replace this circuit pack and repeat this procedure for
the next circuit pack.
■ If none of the TDM Bus tests fail when all of the circuit packs have
been reinserted, the problem has been fixed and the procedure is
completed.
Continue with Procedure 3 if all the port circuit packs have been checked, but
the TDM Bus fault is still not resolved.
Procedure 3
This procedure removes and reinserts SPE and EPN control circuit packs, as
listed in the table at the beginning of this section. In the PPN processor carrier
(SPE), the TDM Bus terminates on slots 11-15. When running diagnostics in the
PPN, the following circuit packs should be tested:
■ TN1655 Packet Interface (three slots available per carrier)
■ TN768/TN780 Tone/Clock
