Upgrading Cpu 1 - Nortel Meridian 1 Manual

Upgrade system installation through x11 release 21

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Upgrades to Meridian 1 option 81

Upgrading CPU 1

553-3001-250 Standard 14.00 August 1996

If QPC775 Clock Controller Cards are equipped, perform these steps to

disable the card:

Note: If the system is equipped with QPC471 Clock Controller Cards,

skip this step and proceed with step 2.

Set the ENB/DIS switch on the clock controller card in CPU 1 to

Disconnect the cable from the NT8D36 InterGroup Module at the

junctor board.

Disconnect the cable at the faceplate of the QPC775 card.

If primary or secondary reference cables are equipped, disconnect

Follow the appropriate step below to turn off power to CPU 1:

For AC-powered systems, set the main circuit breaker for the

column (located at the rear of the pedestal) to OFF (down position).

Because of hazardous voltage in AC-powered systems, power to the

entire column must be shut down. This shuts down all functions in the

column including the network group in that column. Relocate essential

services from this group before proceeding.

to load the program

to get the status of clock 1

to get the status of clock 0

if necessary, to switch to clock controller 0

to disable clock controller 1

to exit the program

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