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DEFINITY Made Easy Tools
Issue 3, December 2001
Install and Wire Telephones
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 500- and 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 Central Office (CO) trunk loops to five selected station sets. The 808A equipment's Ringer Equivalency Number (REN) is 1.0A.
At the Main Distribution Frame (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 Central Office (CO) trunks.
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| Copyright� 2001 Avaya Inc. |
| Send comments to MadeEasy Development Team |
| Always check at the Made Easy Web site for the most current information. |