Nortel Meridian 1 Replacement Manual page 316

Page 316 of 362
553-3001-520 Standard 16.00 April 2000
Replacing equipment
Upgrading Core 0
1 Move the terminal cable to the J25 port on the I/O panel of the other Core
or Core/Network Module, and continue with the following steps for the
replacement of the second IOP/CMDU card.
2 In systems equipped with an NT6D63 IOP and NT6D64 CMDU,
perform the following two steps to remove these cards:
— To remove the IOP:
a Set the ENB/DIS switch to DIS on the IOP being upgraded.
b Remove the IOP.
— To remove the CMDU:
a If there is a floppy disk in the CMDU you are upgrading, remove the
floppy disk.
b Set the power switch on the front of the CMDU, if present, to OFF
(down).
c Wait at least 10 seconds, then unhook the locking devices on the
CMDU and gently pull the unit out of the card cage.
d Continue with step 4.
3 In system equipped with an NT5D20 IOP/CMDU, perform the
following steps to remove this card:
a Set the ENB/DIS switch on the IOP/CMDU to DIS.
b Unhook the locking devices and remove the IOP/CMDU.
c Continue with step 4.
4 Locate the round 1/2" diameter IODU/C Security Device.
5 Make sure that the 8-digit code on the Keycode diskette matches the
8-digit code on the Security Device.
6 With the Nortel side facing upward, slide the Security Device between
the black round security device holder on the top right hand corner of the
IODU/C card and the holder clip. Do not bend the clip more than
necessary when inserting the Security Device. Ensure that the Security
Device is securely in place.