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RADIO TELEPHONE SYSTEM HAVING AUTOMATIC CHANNEL SELECTION

  • US 3,806,804 A
  • Filed: 04/06/1966
  • Issued: 04/23/1974
  • Est. Priority Date: 06/11/1965
  • Status: Expired due to Term
First Claim
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1. A communication system including a plurality of basic communication units, each permanently associated for addressing and supervisory control purposes with a portion of the radio frequency spectrum, and each having transmitting and receiving means, means for establishing a plurality of frequency-spaced channels in each of said basic communication units, less than the number of possible simultaneous calls between said units, means responsive to the initiation of a call from one of said units for automatically assigning a free channel to said call, means in each unit for manually registering an identifying address of the unit to which a call is to be placed, control means, means connected to the control means and responsive to the registration of an address to generate that portion of the spectrum associated with the addressee, and means to modulate the generated portion of the spectrum in accordance with a supervisory message to be transmitted, each supervisory message including characteristics uniquely identifying the addressee.

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