Cordless telephone system

Abstract

Abstract A cordless telephone system constituted by a switching station (1) connected to a cable telephone exchanger and at least one telephone set connected to the switching station via a plurality of radio channels. The switching station (1) has a controller (10) which scans the radio channels and selects a nonused radio channel in response to a calling signal from the telephone exchanger, a signal generator (8) for calling a telephone set (101), a signal detector (13) for detecting a response signal from the telephone set (101), and a transmitter (5). The controller (10) changes the number of radio channels to be scanned in accordance with the frequency of use of the radio channels and the transmitter (5) sends a signal representing a changed number of radio channels. Each telephone set (101) has a controller (106) for scanning the radio channels, a signal detector (108) for detecting the calling signal and the signal representing the number of channels from the switching station (1), and a transmitter (110) for sending a response signal to the switching station (1) (Fig. 1)

Inventors

• 👤 Noboru C/O Nec Corporation Saegusa

Bibliographic Details