Call Processing Stopped (Options 21A And 21); Symptoms - Nortel Meridian 1 Manual

Symptom:

Call processing stopped (options 21A and 21)

Call processing has stopped on a single CPU system. Look up all system
messages and maintenance display codes in the X11 system messages guide
and follow the instructions given. If the fault does not clear, use this
procedure.
For information on switch settings, see Circuit card installation and testing
(553-3001-211). Replace equipment as described in Meridian 1 hardware
replacement (553-3001-520). You may need to replace one of the following:
— CPU card: QPC687
— Data cartridge: QMM42
— FDI card: QPC742
— FDU: NT8D68
— Memory/peripheral signaling card: NT8D19
— ROM card: QPC940
— CE/PE card cage: NT8D1103
Possible cause
Defective module
power supply
Initialization
required
Clearing common equipment faults
Note: Take any action indicated by the maintenance display codes.
Continually observe and look up codes and system messages as you
perform this procedure.
Action
Make sure the green LED on the CE/PE power supply is lit. If it is not lit,
go to "Clearing power faults" on page 19.
If the power supply LED is lit, go to the next possible cause.
Press the manual initialize (Man Int) button on the memory/peripheral
signaling card. If the system initializes, check all fault indicators and clear
any faults indicated.
If the system does not initialize, unseat network cards one at a time. If the
system initializes, replace the last card you removed (it is faulty).
If the system will not initialize, go to the next possible cause.
(continued)
Page 49 of 190
Meridian 1 Fault clearing