Plugging In Ac Power; Dc Power - Avaya G650 Installing

Plugging in AC power

Once you verify that the ground and voltages are correct for the installation, connect to AC
power.
Before turning on the system, check the AC power in the equipment room using a KS-20599
digital voltmeter (DVM) (or equivalent). To check AC power:
1. Verify that the voltage meter reads either 90 to 132 VAC or 180 to 264 VAC by measuring
the AC voltage between the hot and neutral sides of the receptacle. Request that a qualified
electrician correct any problems before proceeding to Step 2.
2. Verify that the voltage meter reads 0 VAC by measuring the voltage between the neutral
and ground sides of the receptacle. Request that a qualified electrician correct any
problems before proceeding to Step 3.
3. Set the AC main circuit breakers to OFF when you finish checking the AC power.

DC power

Figure 11: Typical DC power for a G650
G650 Media Gateway.
Each G650 Media Gateway can be equipped with a maximum of two 655A power supplies. One
power supply is always provided in slot 0 and a redundant unit can be supplied in slot 15. DC
power is supplied, by a DC feed cable, to one connector on the backplane of the G650 Media
Gateway and bussed to each power supply slot. AC and DC current can be supplied to the
655A power supplies at the same time. When both AC and DC current are present, the 655A
uses AC first. Then, the 655A switches to DC without any interruption in service if the AC
current fails.
Each G650 Media Gateway, with either single or redundant power supplies, draws a maximum
of 17 amps of DC current.
48 Installing the Avaya G650 Media Gateway
on page 50 shows a typical DC power layout for a