Nortel Meridian 1 Replacement Manual page 79

11 To place the system back in the redundant (normal) mode with automatic
switchover capability. Perform the following three steps in uninterrupted
sequence on the inactive Core (the Core with the replaced IOP/CMDU):
a Press and hold down the MAN RST button on the CP card of the
inactive Core.
b While holding down the MAN RST button, set the NORM/MAINT
switch on the same CP card to NORM.
c Release the MAN RST button.
After several minutes, an "HWI533" message is issued by the active
Core indicating that the inactive Core memory is being synchronized
with the active Core memory.
12 Set the ENB/DIS switch on all CNI cards in the inactive Core to ENB.
13 Synchronize the disk drives of the two Cores:
LD 137
STAT
SYNC
****
14 Verify CPU redundancy and CNI operation:
LD 135
STAT CPU
STAT CNI
15 Place the active CPU in the normal mode by setting the NORM/MAINT
switch on the CP card to NORM.
Replacing equipment
to load the program
to get status of both the replacement
IOP/CMDUs and the IOP and CMDU (or
IOP/CMDU) in the other Core
to synchronize the drives
to exit the program
to load the program
to get status of both CPUs
to verify the operation of all CNI cards
Page 79 of 362
Hardware replacement