Transceiver with automatic switch-over control, and telecommunications network comprising such a transceiver

摘要

the present invention relates to the automatic control radios to transmit using single side band amplitude modulation.;the issuer shall, prior to each period of vocal activity, a preamble digital signal levels of speech coding, and during these periods.high frequency signals modulated in amplitude constant, and does not provide anything except the preamble and the periods of time.at the time of reception.a signal detector and logic control switch (55) to obtain a signal word only at the entrance to an attenuator (60) whose attenuation is findbased on a decoding circuit (58) of the preamble to the signals to the output of the receiver is composed of the same level as those applied to the input of the transmitter.;application to telecommunications networks.