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Chapter 4 Replacing Components
16 Avaya M770 User’s Guide
Replacing an M-PS
Any one of the power supplies can be hot-swapped without powering down the
hub. If not all three M-PS slots are occupied, insert the new M-PS into an empty slot
before removing the M-PS you wish to replace.
For more detailed information about the M-PS please refer to the M-PS Installation
Guide.
Inserting an M-PS
To insert a new M-PS, perform the following steps at the back of the Avaya M770
hub (see Figure 4.1):
1 If you are inserting an M-PS unit into an empty slot, remove the blank panel
covering the slot by unscrewing its four retaining screws.
If you are inserting an M-PS unit into an occupied slot, remove the M-PS unit
you wish to replace by following the directions in section Removing an M-PS
below.
2 Slide in the new M-PS, ensuring that it is positioned properly.
3 Tighten the four retaining screws.
4Fold the handle.
5 Plug the AC power connector plug into the AC inlet on the M-PS.
6 Plug the AC power supply plug into the wall socket.
7 Turn the M-PS on using its ON switch.
8 Verify that the STATUS LED adjacent to the M-PS ON/OFF switch is green.
Removing an M-PS
To remove an M-PS, perform the following steps at the back of the Avaya M770
hub:
1 Using the M-PS ON/OFF switch, turn off the M-PS which you wish to replace.
2 Unplug the AC power supply plug from its wall socket.
3 Unplug the AC power connector plug from the AC inlet on the M-PS.
4 Unscrew the four retaining screws.
5 Pull the handle to remove the M-PS.
6 Slide out the unit.