Installing the Control Unit

Powering Down the System

During installation you may need to power down the system for troubleshooting or adding new equipment to the carrier.

CAUTION:

Follow these steps in the exact sequence.

1.Turn off the power supply on the basic carrier.

2.Turn off the power supplies on the expansion carriers.

3.Unplug any auxiliary power units.

Because the power supplies are already off, the sequence for removing auxiliary power cords is not important.

4. Unplug the system from the AC outlet.

2-64Powering Down the System

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AT&T Release 2.0 manual Powering Down the System, Follow these steps in the exact sequence