Nortel Meridian 1 Hardware Replacement Manual page 123

SCPU
****
3 Insert the keycode diskette into the floppy drive on the IODU/C with the
non-faulty Security Device.
4 In LD 143, print the pending keycode contents. Use "KSHO F0" if your
keycode is on the diskette in the floppy drive on Core 0, or "KSHO F1"
if your keycode is on the diskette in the floppy drive on Core 1:
LD 143
KSHO F0
or
KSHO F1
5 Perform the KDIF command. Use "KDIF F0 REC" if the keycode
diskette is inserted in the floppy drive on Core 0, or "KDIF F1 REC" if
the keycode is inserted in the floppy drive on Core 1:
KDIF F0 REC
or
KDIF F1 REC
****
6 Disable the inactive IODU/C:
LD 137
STAT
DIS CMDU x
DIS IOP x
Perform the following steps on the inactive Core.
7 Set the ENB/DIS switch on the IODU/C with the faulty Security Device
to DIS.
8 Unhook the locking devices and remove the IODU/C.
9 Remove the round 1/2" diameter IODU/C Security Device from the
black round Security Device holder on the top right corner of the
IODU/C card.
10 Locate the round 1/2" diameter IODU/C replacement Security Device.
11 Make sure the 8-digit code on the Keycode diskette matches the 8-digit
code on the replacement Security Device.
Replacing equipment
switch CPUs (if necessary)
exit LD 135
to load the program
print the contents of the candidate keycode
to print the differences between the candidate and
the current keycodes
to exit LD 143
to load the program
to find the status of the IODU/Cs
to disable the CMDU part of the inactive IODU/C x
to disable the IOP part of the inactive IODU/C x
Page 123 of 250
Hardware Replacement