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Installing and Cabling the Cabinets
138 Installation, Upgrades and Additions for Avaya CMC1 Media Gateways
Install Emergency Transfer Unit and
Associated Telephones
Note:
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 Figure 64: 808A Emergency Transfer
Panel on page 139. Also refer to Table 21: Emergency Transfer and Auxiliary Power on
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.
Install the Emergency Transfer Panel
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:
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.