Apparatus for use with key telephone system with wireless telephone device

Abstract

A key telephone system has output circuits connectable to a plurality of outside lines which are connected to a central exchange. A wireless telephone having a base unit with first and second output terminals and a separable cooperating handset unit having a manually operable number entry device is associated with the system. These units have cooperating radio transmitters and receivers which permit wireless communication links to be established between the units. A cordless telephone-key telephone interconnection interface has first and second output terminals respectively connected to the first and second output terminals of the base unit and output terminals connected to the output circuits of the key system. The interface establishes a plurality of calling numbers for the outside lines to be employed by a user of the handset unit. A different number is associated with each different outside line whereby when the system output circuits are connected to the exchange and the wireless links are established between the units, the user, by entering any one of the numbers into the device in the handset unit, can establish a communication channel between the outside line corresponding to the number entered and the handset unit.

Dependencies are inferred from the claim text.