Nortel Meridian 1 Replacement Manual page 77

8 To remove the faulty CMDU:
a If there is a floppy disk in the CMDU you are replacing, remove the
floppy disk.
b Set the power switch on the front of the CMDU 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. To install the
replacement IOP/CMDU into the IOP/CMDU slot:
d Set the ENB/DIS switch on the replacement IOP/CMDU to DIS.
e Install the IOP/CMDU into slots 17, 18, and 19 in the NT5D21
Core/Network Module or slots 16, 17, and 18 in the NT9D11
Core/Network Module and NT6D60 Core Module. Lock the locking
devices by pushing them gently towards the faceplate.
f Set the ENB/DIS switch to ENB and observe the card LED during
self-test. The LED should flash three times and stay lit until the card
is enabled.
9 To update the software on the CMDU and the ROM on the replacement
IOP/CMDU to the software currently residing on the active CMDU hard
disk:
Replacing equipment
Hardware replacement
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