AT&T 3.0 manual 28Introduction

Unit Loads

Auxiliary Power Units

The power supply provides 54 unit loads (102.6 watts) to each carrier.

If the unit load requirement for a carrier exceeds 54 (102.6 watts), an auxiliary power unit is needed to allow that carrier to support an additional 27 unit loads (51.3 watts).

CAUTION:

Running the system with more than 54 unit loads (102.6 watts) per carrier may not appear to do harm. However, this can cause the system to malfunction, creating “No Trouble Found” conditions.

An auxiliary power unit redirects the power requirements from the last two slots on the carrier. Any extension connected to the modules in the last two slots receives power from the auxiliary power unit instead of from the power supply. If an auxiliary power unit is required, complete installation instructions are provided in Installation.

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