Avaya 655A Power Supply
Solution Overview
The Avaya G650 can use one or two Avaya 655A power supplies that can have both AC and DC input power
present. Either power supply can provide all the power needed by the G650. When there are two power supplies, they share the power load. One power supply can operate on AC power and the other on DC power. But, if AC power is available, the system always uses AC power.
The Avaya 655A power supply is:
- The only power supply supported in the G650
- Not backward compatible to other carrier types
If you use only one Avaya 655A power supply, place it in slot 0. If you are using two power supplies, place them in slots 0 and 15.
Note: You can insert or remove a redundant power supply and not affect the G650 if the other Avaya 655A power supply is operating.
Avaya 655A Power Supply Detailed Description
Input Power
The Avaya 655A power supply can operate on either AC or DC input power. But, if AC power is available, the system always uses AC power. One power supply can operate on AC power, and the other on DC power. The power supplies use AC power first and switch to DC power if AC power fails or is not present.
AC Power
Commercial AC is the primary input power source. Both slot 0 and slot 15 have dedicated AC input. The Avaya 655A power supply can operate on AC input that ranges from 90 to 264 VAC at 47 to 63 Hz. The nominal ranges for AC power are:
- 100 to 120 VAC at 50 or 60 Hz
- 200 to 240 VAC at 50 or 60 Hz
DC power
Minus 48VDC power can be supplied simultaneously as backup power. One -48VDC power input point is provided on the G650 backplane and is distributed through the backplane to each power supply.
LEDs
The five LEDs on the faceplate of the Avaya 655A power supply are in a vertical line with the red LED on top. These five LEDs provide the following status:
- Red – This LED:
– Lights when there is a failure in either the power supply or the fans. For a Avaya G650 with
redundant power supplies, a failure in the fan assembly results lights this LED on both
power supplies.
– Flashes off once per second when the software shuts down the ring voltage output of a
power supply - Yellow – This LED:
– Lights when the status of the power supply and fans is OK
– Flashes once per second when the software shuts down a single power supply, in a
carrier with operational redundant power supplies - Green – Lights when there is AC power applied to the power supply
- Green – Lights when there is DC power applied to the power supply
- Green – Lights when the power supply is supplying ringing to the G650
Avaya 655A ring generation
The Avaya 655A provides either North American ringing (20Hz) or European/International (25Hz) ringing. The 655A also has a setting to provide no ringing. This setting is applicable when the customer supplies a ring generator that is external to the power supply. An example of an external ring generator is the TN2202 French ringing circuit pack. The 655A power supply provides a physical slide switch to select the frequency of the ring generator. The options are:
- 20Hz — North American
- 25Hz — European and international
- Other — No ringing output. Applicable when an external ring generator is used such as the
TN2202 French ringing circuit pack.
You must remove the power supply from the G650 when you change the ringing frequency selection. The ringing frequency selection switch is on the back of the power supply. Only one 655A supplies ringing to the Avaya G650. The power supply in slot 0 in the Avaya G650 with an A carrier address is the default for ringing. The system uses this default Avaya 655A unless the Avaya 655A has failed or the software has commanded it to shut down. When a G650 carrier has redundant power supplies, one supply automatically supplies ringing if the other power supply fails. A Avaya 655A provides ringing to only one G650 carrier. For example, the 655A power supplies in carrier A supply ringing to carrier A only. Meanwhile, the power supplies in carrier D supply ringing to carrier D only. If the ring generation in both of a carrier’s power supplies fail, no other power supply provides ringing for the carrier.
This Item sells in Refurbished Condition and as always it will be delivered in A++ condition.
For more information visit our Library for Avaya 655A Power Supply.
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