Nortel Networks 1000M warranty Adding a module to the top of a column

Page 374 of 456 Adding a module to a column

Adding a module to the top of a column

In a DC-powered system, power to the column can remain on during this procedure.

If conduit or other cabling runs through the top cap, you must tag and disconnect the cables, pull them out of the way, and reroute them after the new module and the top cap are positioned.

Procedure 72

Adding a module to the top of the column

1Disconnect and remove the NT8D22 System Monitor for the column in the rear of the pedestal (do not turn off the blower unit in the front of the pedestals):

a.If the column houses the master system monitor, load LD 37 and software disable the associated SDI port:

LD 37

DIS TTY x disable the device associated with the port

b.Disconnect the RJ11 cable to J3, then the cable to J6, then pull the system monitor out of the slot.

2Turn off power as necessary:

• With AC power, set the main circuit breaker for the column to OFF (down) in the rear of the pedestal.

DANGER OF ELECTRIC SHOCK

Due to hazardous voltage in AC-powered systems, power to the entire column must be shut down. This shuts down all functions in the column.

•With DC power, set the switch on the module power supply and the circuit breaker in the rear of the pedestal to OFF (down) for the module being added.

NN43021-310 Standard 02.01 December 2007