Nortel Meridian 1 Replacement Manual page 221

Note: If you are using only one terminal or a switch box, switch the
connection from Core to Core as needed.
2 The CP card you are replacing must be in the inactive Core. Check the
status of the NT9D19 Call Processor cards:
LD 135
STAT CPU
If necessary, switch Cores:
SCPU
****
3 Set the NORM/MAINT switch on the NT9D19 Call Processor card to
MAINT on the active Core.
4 Set the ENB/DIS switch on all CNI cards on the inactive Core to DIS.
5 Perform the following three steps on the inactive Core in an
uninterrupted sequence:
a Press and hold down the MAN RST button on the CP card on
the inactive Core.
b Set the NORM/MAINT switch to MAINT.
c Release the MAN RST button.
The system is now in split mode where each Core is functioning
independently and the automatic switchover has been disabled.
Installing equipment
1 Set the NORM/MAINT switch to MAINT on the replacement card.
2 Insert the Install Program diskette which corresponds with the NT9D19
(68040) Call Processor card.
3 Remove the current CP card and put it in a static bag and box.
4 Insert the CP replacement card into its vacated slot and hook the locking
devices.
5 Press the MAN RST button on the replacement CP card.
Replacing equipment
determine which CP card is active
switch Cores
exit LD 135
Page 221 of 362
Hardware replacement