Installing the Control Unit

NOTE:

On initialization of a Release 1.0 system, all loop-start and ground- start trunks default to loop-start. In Releases 1.1 and 2.0, if the system is programmed for Key mode, the strap is checked on initialization. If the strap is set (Key-only operation), all trunks revert to loop-start. If the strap is not set, any programmed designation of ground-start trunks is retained.

The ground-start pool never has trunks assigned to it automatically, but must be programmed after the ground-start ports are designated. In Releases 1.1 and 2.0, ground-start trunks are assigned to the ground-start pool on initialization, except in a system strapped for Key mode operation.

2.Install the feature module in the processor as indicated in “Step 2a: Installing the Feature Module.”

3.Insert the processor into the carrier as indicated in “Step 3: Installing the Processor in the Carrier.”

CAUTION:

To prevent damage from electrostatic discharge (ESD), avoid touching leads, connectors, pins, and other components when handling the circuit board. Use a properly grounded wrist strap.

4.Install or replace the auxiliary power unit as described in “Step 4a: Installing the Auxiliary Power Unit” or “Step 4b: Replacing an Auxiliary Power Unit.”

5.Provide the proper grounding as described in “Step 5: Providing the Proper Grounding.”

2-40Installing the Processor

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AT&T Release 2.0 manual