Nortel Meridian 1 Replacement Manual page 71

Replacing the IOP/CMDU in a single CPU system option
Note: In a single CPU system Option, i.e. Option 51C, replacing the
faulty IOP/CMDU will disrupt call processing.
1 Check the status of the IOP/CMDU:
LD 137
STAT
****
2 Perform equipment data dump if possible. If the IOP/CMDU is faulty, a
successful data dump may not be possible:
LD 43
EDD
****
3 Disable the IOP portion of the IOP/CMDU:
LD 137
DIS IOP
4 To remove the faulty IOP/CMDU and replace the data cartridge from the
faulty IOP/CMDU to the replacement IOP/CMDU:
a Set the ENB/DIS switch on the faulty IOP/CMDU to DIS.
b Remove the IOP/CMDU.
c Remove the screw that secures the QMM42 Data Cartridge. Gently
unplug the cartridge from the connectors on the component side of
the IOP/CMDU.
d Plug the above QMM42 Data Cartridge into the replacement
IOP/CMDU and install the screw that secures it to the IOP/CMDU.
Replacing equipment
to load the program
to get the status of the IOP/CMDU
to exit the program
load LD 43
execute datadump and wait until
"DATADUMP COMPLETE" and
"DATABASE BACKUP COMPLETE" are
displayed before exiting the program.
exit LD 43
load LD 137
Disable the IOP.
Page 71 of 362
Hardware replacement