Avaya CMC1 사용자 설명서

Note:

Install only 1 emergency transfer power panel per system. 

Emergency transfer capability is provided by an 808A Emergency Transfer Panel (or 
equivalent) mounted next to the trunk/auxiliary field. See 

on page 139. Also refer to 

page 116 for the pinout of the AUX (J1) connector.

Use analog telephones for emergency transfer. The 500-and 2500-type telephones can also be 
used as normal extensions. Emergency transfer capability may be provided on analog CO and 
Wide Area Telecommunications Service (WATS) trunks.

The transfer panel provides emergency trunk bypass or power-fail transfer for up to 5 incoming 
CO trunk loops to 5 selected station sets. The 808A equipment’s Ringer Equivalency Number 
(REN) is 1.0 Amp.

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. 

The 808A Emergency Transfer Panel is used in the following installation example.

To install the 808A Emergency Transfer Panel:

1. Install the transfer panel on any mounting frame in either a vertical or horizontal position. 

The housing has ears for screw-mounting and cutouts for snap-mounting the unit in an 
89-type mounting bracket. 

Note:

Install the panel so it can be accessed only by authorized personnel. The location 
must meet standard environmental considerations such as temperature, 
humidity, and so forth.

2. Verify dial tone is present at each trunk circuit.