AT&T 518-600-016 manual Installing the Control Unit

The Release 3 Feature Module can only be used with the Processor Modules (517B7 and 517C7) developed for Release 3.

CAUTION: When replacing a Feature Module, make sure that you have all the necessary records to readminister the system. When the Feature Module is replaced, all system memory is lost, and the system will have to be readministered.

1Affix the round (FMl, FM2, or FM3) label to the front of the Processor Module housing.

2Remove power from the system. Make sure that the ON/OFF switch on the Power Supply Module is set to the OFF position.

3Remove the Processor Module from the system and rest it on a flat surface with the right (as viewed from the front edge) side up.

CAUTION: Be sure to follow proper electrostatic discharge precautions. Refer to “Static Discharge Problems” on page 2-9.

4If you are upgrading, remove the previous Feature Module.

5Align the connectors of the Feature Module with the connectors of the Processor Module.

6Snap the Feature Module into the Processor Module.

7Install the Processor Module in slot 0 of the carrier.

2-74 Installing the Control Unit