Importance

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Abstract

A cordless telephone system which allows, in addition to outside-line communication, extension communication between wire and wireless telephone sets and also which can prevent wiretapping of communication contents during the outside-line communication. The system comprises a first switch connecting a connection unit to a wire telephone circuit, a connector connecting the wire telephone set to a connection-unit terminal of the first switch, a second switch switchingly controlled by the connection unit to supply a predetermined DC current to the connection-unit terminal of the first switch, and a DC power source for outputting the predetermined DC current. Further provided in the system, in addition to the above arrangement, are a third switch connected as inserted between the connection-unit terminal of the first switch and a voice circuit of the connection unit and a fourth switch connected as inserted between the connection-unit terminal of the first switch and the connector.

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First Claim