Apparatus for transmitting and recording signals

Details Apparatus for transmitting and recording signals Apparatus for transmitting and recording signals

H - Electricity

04

B

379/11, 325/31

H04B 7/24 (2006.01) H04M 1/725 (2006.01) H04M 1/727 (2006.01)

Patent

CA 1247705

ABSTRACT OF THE DISCLOSURE Apparatus for transmitting and receiving signals for use with a so-called cordless telephone, in which an audio signal and an identification code signal are transmitted and received by both the handset and base unit of the telephone and when the identification code signal is not correctly detected, as might be caused by cross-talk interference, the transmitter is disabled and a vacant communication channel is searched for and a communication channel is changed to thereby prevent a cross-talk interference. The unit that does not correctly receive the code signal immediately disables its transmitter and searches for a vacant channel and, because the code signal had been alternately transmitted and received between the two units, the other unit detects the stoppage of code signal transmission, disables its own transmitter, and then also moves to the next vacant channel to await further transmission of the code signal.

510785

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