Replacing A Power Supply Unit - Avaya G450 Replacing

Job Aid: Replacing the Field Replaceable Units (FRUs) for the Avaya G450 Media Gateway

Replacing a power supply unit

The G450 provides full redundant, load sharing power supply units (1 + 1). A single power
supply unit (PSU) provides sufficient power for any G450 configuration. If you choose to install
two PSUs, they operate in a load sharing mode.
The G450 supports hot swap of the PSU. Even if you have only one PSU installed, there is no
need to power down or reset the G450 when replacing a faulty PSU. You can install the
replacement PSU in the second PWR slot, and it will become the active PSU once you remove
the faulty PSU.
Figure 5: Replacing a power supply unit
To remove a PSU:
1. Disconnect the G450 power cable from the mains socket.
2. Disconnect the G450 power cable from the power connector, located on the front panel of
the PSU, at the rear of the G450.
3. Loosen the two captive screws, one on each side of the PSU.
4. Grasp the two side handles and pull the PSU out of its slot.
To insert a PSU:
1. Position the PSU before the opening and engage both sides of the unit in the interior
guides.
2. Slide the PSU slowly into the chassis, maintaining an even pressure to assure that the unit
does not become twisted or disengaged from the guides.
3. Close and tighten the two captive screws on the front panel.
4. Connect the power cable to the power connector on the PSU.
5. Plug the power cable into a mains socket. When the PSU is powered, the green LED on the
PSU panel lights.
8 Job Aid: Replacing the Field Replaceable Units (FRUs) for the Avaya G450 Media Gateway