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Title: Transmit/receive mode protection arrangement

Abstract: An arrangement for preventing inadvertent transmission by a push-to-talk transceiver that might join a communications channel. After the push-to-talk switch has been activated, an average background noise level is established. Audio from speech, for example, having peaks greater than a predetermined percentage of the average background noise level are required to maintain the push-to-talk function activated.


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Inventors: Foster, George B. (Columbus, OH)
Harris, David E. (Columbus, OH)

Application Number: 06/235990
Filing Date: 1981-02-19
Publication_date: 1982-12-28
Assignee: FOSTER AIRDATA SYST INC

Primary Class(es): 455/79 381/110
Other Classes: H04B1/46; H04B1/44; H04B1/46
US Patent Ref:
3500459March, 1970Battin et al.TIME LIMITED TRANSMISSIONS
4119797October, 1978Wollert179/1HFVoice operated switch having an activation level which is higher than its sustaining level

Other Refs: SU474116
January, 1976179/1VC

Primary Examiner: Bookbinder, Marc E.
Assistant Examiner:
Attorney: Cushman, Darby & Cushman
Claims:
We