AT&T 3.0 manual 4Upgrading the System

Powering Down the System

Powering Down the System

You may need to power down the system to add upgraded equipment to the carrier.

CAUTION:

Follow these steps in the exact sequence.

To power down the system, follow the steps below and see Figure 9–2:

1Turn off the power supply on the basic carrier.

2Turn off the power supplies on the expansion carriers.

3Unplug any auxiliary power units.

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

4Unplug the system from the AC outlet.

9-4Upgrading the System