Demand test descriptions and error codes - Avaya Support

Part 3
Use Part 3 for each individual circuit pack listed in the previous table. Run this procedure on
every circuit pack in the standby PNC. If the TDM-bus failure still exists (once every standby
circuit pack has been tested), execute reset pnc interchange, and set tone-clock to
put the currently active circuit packs into standby mode so that this procedure can be run on
each of them.
1. Remove the inactive suspected circuit pack.
2. As in Procedure 2, determine whether any backplane pins on the back of the removed
circuit pack’s slot are bent.
3. If the pins are bent, do the following:
a. Remove power as described in the previous warning statement.
b. Straighten or replace the pins.
c. Restore power.
d. Run test tdm P to determine whether the TDM-bus fault is still present.
If the TDM-bus failure is still present, the problem is with another circuit pack. Reinsert
the originally suspected circuit pack, and repeat Part 3 for the next circuit pack.
e. If the TDM-bus failure has disappeared, reinsert the circuit pack and run test tdm P
to see if the TDM-bus failure is still present.
If any of the TDM-bus tests fail, replace the suspected circuit pack. The procedure is
finished.
If not, the procedure is finished.
If the backplane pins are not bent, run test tdm P to determine whether the TDM-bus
fault is still present.
f. If any of the TDM-bus tests fail, the problem is with another circuit pack. Reinsert the
originally suspected circuit pack, and repeat Part 3 for the next circuit pack.
g. If not, replace the suspected circuit pack. The procedure is finished.
4. If every standby circuit pack has been tested but the TDM-bus failure still exists, execute
reset pnc interchange and set tone-clock to put the currently active circuit
packs into standby mode. Repeat Part 3 of this procedure for each of the newly active
circuit packs.
Procedure 4: Isolating TDM-Bus Failures to Carriers
Procedure 4 attempts to isolate a TDM-bus failure to a particular set of carriers. Only the circuit
packs in selected carriers are checked. Procedure 4 is used if the preceding procedures fail,
because it can help locate failures of:
● Multiple circuit packs
● The carrier’s hardware itself
958 Maintenance Alarms for Communication Manager, Media Gateways and Servers