Avaya 03-300686 Emergency transfer units and associated telephones

Installing and wiring telephones and trunks

96 Installing and Connecting the MDF and Telephones

See Figure 41: Example adjunct power connectionson page 85 and Figure 46: Connections

at trunk/auxiliary field on page 96.

Figure 46: Connections at trunk/auxiliary field

Emergency transfer units and associated telephones

An 808A Emergency Transfer Panel mounted next to the trunk/auxiliary field provides

emergency transfer capability. You can use 2500-series analog telephones either for

emergency transfer or as normal extensions. For emergency transfer, connect the phones

directly to the 808A; for normal extensions, wire them through the 808A. Analog central office

(CO) and Wide Area Telecommunications Service (WATS) trunks can provide emergency

transfer capability.

The 808A Emergency Transfer Panel provides emergency trunk bypass or power-fail transfer

for up to five incoming CO trunk loops to five selected station sets. The 808A equipment’s

Ringer Equivalency Number (REN) is 1.0A.

At the MDF, the unit is controlled by a connection to a yellow terminal row/connecting block in

the trunk/auxiliary field. The unit is controlled by -48 VDC from the EM TRANS RELAY PWR

terminals. There is one EM TRANS RELAY PWR terminal pair that allows powering one transfer

unit. This wire pair (in the DB9 alarm cable) is connected to the TN2312BP adapter in only the

A-level carrier. Therefore, the G650 Media Gateway only supports one 808A per G650 port

network.

Figure notes:

1. To Network Interface Facility

2. To Control Carrier Auxiliary

Connector

3. One Pair of Wires

4. 24th Pair of RJ21X Network

Interface Jack

RBP

696