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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.”
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Installing the Processor