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Demand test descriptions and error codes - Avaya Support

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Figure 8: AC Power Distribution in Multicarrier Cabinets<br />

Power Backup<br />

"C" Position<br />

Carrier<br />

"A" Position<br />

Carrier<br />

"F" Position<br />

2<br />

Fan Unit<br />

"E" Position<br />

Carrier<br />

Power<br />

Distribution 3<br />

Unit<br />

If AC power fails, three 48-V DC batteries power the system for:<br />

● 15 seconds in a PN cabinet<br />

CARR-POW (Carrier Power Supply)<br />

● 10 minutes in the expansion control carrier in the “A” position of a PN cabinet<br />

Uninterruptible Power Supply<br />

"B" Position<br />

Carrier<br />

"D" Position<br />

Carrier<br />

Battery<br />

Charger<br />

(Optional)<br />

mcc4_g3 RBP 041696<br />

An external UPS provides a longer backup time than holdover batteries <strong>and</strong> can replace the<br />

batteries <strong>and</strong> battery charger. The unit connects from the AC power source to a cabinet’s AC<br />

power cord. If AC power fails, the unit supplies its own AC power to the cabinet.<br />

Issue 5 May 2009 255

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