Installing and wiring telephone power supplies
Installing the Avaya S8700 Media Server with an Avaya G650 Media Gateway 233
December 2003
Installing the wall-mounting plates
The top plate is used for mounting the back-up battery. The bottom plate is used to mount the power
supply and distribution units. The plates can be rack-mounted using standard rack-mounting brackets.
See Figure 92, 1145B2/1146B2 mounting arrangement,
on page 231.
1 Locate one plate directly below the other one such that the AC power cord (6.5 feet [2 meters])
reaches the electrical outlet from a power supply mounted on the bottom plate. Both plates should
be located so the raised letters are right side up.
NOTE:
A maximum of four power supplies can be powered from one dedicated 110 VAC,
20 amperes (or 230 VAC, 15 amperes) feeder. Use only nonswitched outlets (outlets not
connected to a wall switch).
2 Secure the wall mounting plates to a standard 3/4-inch (2 centimeters) thick plywood mounting
board. Each mounting plate comes with four #10 x 1/2-inch wood screws.
3 The 1145B2 Power Supply is snap-fit onto the bottom wall mounting plate without tools.
4 An installer-provided insulated ground wire, 16 AWG (#12) (1.2 square millimeters) or greater, is
required to connect the power supply frame ground lug to an approved ground. The frame ground
screw is located next to the AC outlet, to the left of the unit.
Mounting the 1146B2 Power Distribution Unit
See the 1146B2 Power Distribution Unit in Figure 93, Expanded power distribution unit, on page 232.
1 Insert and securely tighten the two supplied #8-32 x 1/2-inch shoulder screws (they have an
unthreaded section at the top) into the top holes designated for 1146B2 Power Distribution Unit
on the bottom plate. Mount the unit on these two shoulder screws, using the key holes on the back
of the unit.
2 Secure the unit by inserting the #8-32 x 1-inch screw through the bottom of the unit (just above
the wire clips) into the plate and tighten.
3 Set the battery back-up switch option to the 1-32 (down) position to provide battery back-up to all
outputs.
4 Connect the power distribution unit to the power supply with the power cable. See the power
supply’s right-hand label to locate the output power connection.
Installing the battery mounting/wiring
Three types of back-up batteries are used. See Table 30, Back-up battery rating, on page 234 for the
battery type and rating.
1 Insert two #10-32 x 1/2-inch shoulder screws into the top designated battery holes on the wall
mounting plate. Lightly screw in but do not tighten.
2 Place the keyhole slots in the battery bracket on these two screws. The battery cord exits from the
right of the bracket. Make sure the label on the battery is visible. Tighten the screws securely.
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