Emergency Transfer Units And Associated Telephones - Avaya S8700 Installation Instructions Manual

Figure 86: Connections at trunk/auxiliary field
Figure notes
1 To Network Interface Facility
2 To Control Carrier Auxiliary Connector
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 are seven EM TRANS RELAY PWR terminal pairs that allow powering of up to seven transfer
units.
Should power be restored to the relays while a call connected through the 808A is in progress, the 808A
maintains the connection until the user goes on-hook. Each 808A can handle up to five CO trunks.
Installing the Avaya S8700 Media Server with an Avaya G650 Media Gateway
December 2003
Installing and wiring telephones and trunks
25
50
IN
r758482b RBP 062696
3 One Pair of Wires
th
4 24 Pair of RJ21X Network Interface
Jack
219