Cordless telephone system

摘要

A cordless telephone system comprises a radio telephone set (2) and a connection unit (1) connected to a wire telephone circuit (3) and also connected to the radio telephone set through a radio communication circuit, for interconnection control between the wire telephone circuit and the radio telephone set. When the wire telephone circuit (3) is put in its unusable state or a signal on the radio communication circuit is put in its unreceivable state, the connection unit (1) transmits a disconnecting signal to the wireless telephone set (2) to forcibly cut off the radio communication circuit.