Abstract: A control apparatus for an automatic radio paging system comprising a paging tone encoder circuit for generating a plurality of paging signals, a radio transmitter for transmitting the paging signals and a plurality of mobile pagers which are each tuned to a different paging signal. In particular, the control apparatus of the present invention communicatively coupled a Touch-Tone telephone subset with a radio paging system such that the person making the page is capable of initiating and controlling the paging operation from a remote telephone subset. The control apparatus provides the calling party with access to the radio paging system only after the calling party submits a properly coded access signal to the control apparatus. Thereafter, the calling party is free to initiate a page by sending paging information to the control apparatus from a Touch-Tone telephone subset.

Abstract: An electronic control device interfaces a duplexed frequency radio communications system with an ordinary telephone set to enable two-way communication between mobile two-way radios and land line telephones. In response to an enabling signal transmitted from a mobile radio unit, the electronic interface device automatically connects an associated base station radio with outgoing telephone lines thereby allowing the operator of the mobile radio to direct dial a land-line telephone using an encoder device associated with the mobile radio unit. In response to a disabling signal, initiated by either the mobile unit operator or a land-line party, the interface device functions to automatically disconnect the telephone line from the base station radio, thereby terminating the call. Alternatively, a timing circuit likewise terminates the call after a preselected time following transmission of the last communication.