Uninterruptible Power Supply���

A recommended Uninterruptible Power Supply (UPS) may be used for power holdover. The type of UPS depends on the holdover requirements. Total holdover capacity varies depending on the UPS. The UPS must provide surge protection for the media gateway.

CAUTION: The major alarm contacts are designed to be connected ONLY to a UPS that can indicate that it is on backup power. For most non-Avaya UPSs, you should not use the major external device leads.

1. Connect the UPS to an electrical outlet capable of handling the power requirements of the media gateway:
1. 100 volts AC, 4.5 amps
2. 120 volts AC, 3.8 amps
3. 200 volts AC, 2.3 amps
4. 220 to 240 volts AC, 2.0 amps
2. Ensure that the media gateway is connected to an "nonswitched" or "always on" electrical outlet on the UPS.
3. For an Avaya UPS, connect and administer the UPS.

NOTE: If an Avaya UPS is wired as recommended, holdover time for each power outage is 1�minute before an automatic shutdown. A UPS may handle any subsequent power outage based on its total battery capacity.