Avaya 03-300430 User Manual

on page 273 shows the LED and alarm conditions for the 

650A Power Supply. Ring voltage and neon bus output do not activate alarm status.

The G650 media gateway normally has two 655A power supplies. Each has a set of five LEDs, 
the function of which is indicated in 

Normally the ring voltage LED (#5) on the left power supply is ON and the ring voltage LED on 
the right power supply is OFF. This changes momentarily when the ringer interchange test is 
run. The ring voltage LED will only remain lit on the right power supply when there is a power 
supply failure of the left hand supply or the left hand supply is removed.

Normal

Red off; 

Yellow on

Open

Normal

No input power

Red off; 

Yellow off

Closed

No input power

DC output not present (except Neon)

Red on; 

Yellow off

Closed

DC output not present 

(except Neon)

Fan alarm

Red on; 

Yellow on

Closed

Fan alarm

1

Red

Failure of power supply or fan

2

Yellow

Status of power supply OK

3

Green

AC input voltage applied

4

Green

DC input voltage applied

5

Green

Power supply providing ring voltage