To facilitate a quick, positive connection, our Patent Pending BW-3 works in this way:

The White wire is the 4 conductor wire leading into the alarm panel. The Red and Green wires supply dial tone to the panel, and the dial tone is returned on the black and yellow wires.

You simply remove the small cover plate, plug in the BW-3, and insert the alarm wire to the BW Connector's terminal header which is clearly marked for Tip, Ring,(feed) and T-1 and R-1, (return).

Loosen the Red and Green screw terminals and insert the color coded spade lugs under the screw terminals as shown.

Plugging in the male plug provides dial tone to the alarm panel, and the spade lugs return the seized dial tone back to the house phones on the screw terminals.