Cordless telephone subscriber's appts. - has control unit connected via telephone lines to public network and several basic units connected to control unit, together with several hand appts. connected to basic unit via radio

摘要

The cordless system telephone appts. has a control unit (1), which is connected to a public telephone network (40) by telephone lines (50). Basic units (2(1))- (2(m)) and hand appts. (3(1))-(3(n)) with antennas (5) are assigned to the control unit. The total of the radio traffic area-consisting of the basic units connected to the control unit-is divided into several zones. In each zone, at least one basic unit is provided for the receipt of radio connections with the hand appts. in the zone. The hand appts. which can be moved within the zone find open data channels for the commencement of communication with the basic units, and then permit speech connections through the control unit connected to the base unit and the public telephone network. ADVANTAGE - Reduces current use by batteries in cordless telephones during waiting periods.