Avaya 03-300430 User Manual

The AC power supply produces the following DC outputs: +5 VDC, -5 VDC, -48 VDC, +12 VDC, 
and a battery-charging voltage. The DC outputs distribute power on the cabinet backplane to 
the circuit pack slots.
The AC power supply also produces AC ringing voltage. The AC ringing voltage output value 
and frequency depend on the country of use. The power supply has a circuit breaker and EMI 
filtering.

Two types of battery holdover are available:

●

The small battery assembly provides short-term battery holdover. If AC power fails, 48 
VDC batteries power the system for:

- 15 seconds in a PN cabinet

- 10 minutes in the expansion control carrier in the “A” position of a PN cabinet

●

Some AC-powered multicarrier cabinets (MCCs) contain three 48-Volt batteries and a 
battery charger (397C) to provide backup power in case power is interrupted. The 
holdover times are identical to those above.

A holdover circuit in the power supply allows a system to operate normally during AC power 
interruptions. When AC input power fails, reserve batteries supply power to the memory and 
processor circuit packs and fans for two minutes. Every port circuit pack is inactive during this 
time. The power supply contains a battery charger to charge the holdover batteries.

0

1

1. Run the short test sequence first. If every test passes, run the long test sequence. Refer to each 

appropriate test’s description, and follow its recommended procedures.

0

Any

Any

Any

test environment UU sh r 1

513

Any

AC Power Query test

(#78)

WRN

OFF

test environment UU sh r 1