Converting The Sl-1 Hardware - Nortel Meridian 1 Manual

Upgrade system installation through x11 release 21

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SL-1 NT system upgrades

Converting the SL-1 hardware

553-3001-250 Standard 14.00 August 1996

Continuing with the upgrade will disrupt system operation. Minimal

service can be maintained if a power failure transfer unit (PFTU) is

Preparing the NT system for upgrade

To prepare an NT system for conversion to an option 61C:

Set all shelf circuit breakers to OFF.

Set the CAB INP circuit breaker on the QSP43 power control shelf in the

QCA58 cabinet and all other shelf circuit breakers to OFF.

Set the AC input circuit breaker on the –48V rectifier in the QCA58

cabinet to OFF.

Disconnect all network loop cables connected to QPC414 Network cards

and cables connected to QPC139 SDI cards.

Set the ENB/DIS switch on the faceplate of the QPC33 Tape Unit

Interface (TUI) card located in the CPU/MEM shelf to DIS. If equipped

with a mass storage unit, repeat this step for the mass storage unit

interface card.

Remove the tape and set the power switch on the faceplate of the tape

unit to OFF or 0. If equipped with a mass storage unit, repeat this step by

removing the disks and turning the MSU power switch to OFF.

Disconnect and remove the cable from the faceplate of the QPC33 card

to the tape unit. If equipped with a mass storage unit, disconnect the cable

between the MSU and the MSI or EMSI faceplates.

Disconnect cables from the faceplate connectors on cards located in the

CPU/MEM and network shelves.

Remove cards from the CPU/MEM shelf and store them in a safe place.

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