Installing the Avaya S8700 Media Server with an Avaya G650 Media Gateway 109
December 2003
Connecting remote power off cable, if required Figure 20, Remote power off cable connections —
Part 1, on page 100 shows the location of the Remote Power Off (RPO) cable. The opposite end of the
cable connects to the Emergency Power Off (EPO) switch located for the equipment room.
Even though the equipment room EPO switch disconnects main AC power to the equipment room, it
cannot disconnect the battery power from the J58890CH. An auxiliary set of contacts inside the EPO are
used for this function.
1 Plug the RPO cable into the connector shown in Figure 21, Remote power off cable connections
— Part 2, on page 101.
2 Route the opposite end of the wires to the EPO switch. The opposite end of the RPO cable
connects to the internal relay.
NOTE:
The EPO switch and the auxiliary contacts (inside the EPO switch assembly) are
customer-provided.
CAUTION:
The auxiliary contacts inside the EPO switch assembly must close when the switch is
pressed. This contact closure energizes the relay inside the power distribution unit,
causing the connection to the battery holdover assembly to open.
Figure 22, External alarm cable connection,
on page 102 shows the cabling from the auxiliary
contacts inside the EPO switch assembly and how they connect to the internal relay.
3 Connect the RPO wires to the auxiliary contacts on the EPO switch. See Figure 29, External
alarm cable connection, on page 111.
NOTE:
The EPO switch and the auxiliary contacts for the RPO connection are customer-supplied.
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