Radio communication system operable in cooperation with a VOX system

DETAILED DESCRIPTION What is claimed is: 1.
A radio communication system for use in carrying out communications between a mobile station and a fixed station through an assigned radio channel, comprising: a mobile station; a fixed station; said mobile station and said fixed station transmitting and receiving a transmission and a reception radio signal, sid mobile station being of a voice actuated type and comprising a transmitting circuit for generating said transmission radio signal, means for producing a succession of audio signals and for directing said signals to said transmitter circuit with a pause between adjacent ones of said audio signals, detecting means for detecting said audio signals and for producing a detection signal which lasts during the presence of each said audio signal and has a beginning and an end; enabling means coupled to said detecting means for enabling said transmitting circuit in response to said detection signal; processing means located at said fixed station for processing said reception radio signal into a first reproduction of said audio signal; said mobile station further comprising: producing means responsive to said detection signal for producing, upon the end of said detection signal, a duration signal and a predetermined coded data signal representing the continuance of said audio signal succession and indicating said pause, and for providing said coded data signal to said transmitting circuit and said duration signal to said enabling means, whereby said enabling means continues to enable said transmitting circuit, even in the absence of said audio signal, to further generate said transmission radio signal modulated by said predetermined coded data signal; and said processing means comprising: reproducing means responsive to said reception radio signal for reproducing said first reproduction of said audio signal and a second reproduction of said predetermined coded data signal; and separating means for separating said second reproduction from said first reproduction, and means for holding said assigned radio channel during said pause in response to said second reproduction