Importance

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Abstract

An entry door telephone system having a touch-tone telephone with a keypad and an incoming phone line connected to the telephone. A door speaker phone is switchably connected in parallel with the touch-tone telephone, and a paging module is switchably connected in series with the door speaker phone for completing a circuit between the touch-tone telephone and the door speaker phone in response to a data signal transmitted from the keypad of the touch-tone telephone. For controlling operation of this system, a control box is connected to the paging module, the door speaker phone and the touch-tone telephone such that the circuit between the touch-tone telephone and the door speaker phone is broken in response to a data signal transmitted by the touch-tone telephone. Finally, a power source is connected to the paging module and the control box for supplying power thereto.

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First Claim