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Install emergency-transfer panel and associated telephones
S8100 Installation and Upgrades 127
November 2003
Install emergency-transfer panel and associated
telephones
NOTE:
Install only 1 emergency transfer power panel per system.
An 808A emergency-transfer panel (or equivalent), mounted next to the trunk/auxiliary field, enables
emergency transfer. See Figure 42, 808A emergency-transfer panel,
on page 128. Also see Table 16,
Emergency transfer and auxiliary power, on page 115 for the pinout of the AUX (J1) connector. 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.
Use analog telephones for emergency transfer. The 500- and 2500-series telephones can also be used as
normal extensions. Emergency transfer capability may be provided on analog CO and Wide Area
Telecommunications Service (WATS) trunks.
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
To install an 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 and humidity.
2 Verify that dial tone is present at each trunk circuit.