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Pager with reverse paging facility

  • US 5,335,246 A
  • Filed: 10/15/1992
  • Issued: 08/02/1994
  • Est. Priority Date: 08/20/1992
  • Status: Expired due to Fees
First Claim
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1. Paging apparatus comprising:

  • at least one base station including a base transmitter which periodically transmits timing signals; and

    a plurality of remote units, each including;

    a mobile receiver operative to receive timing signals transmitted by at least one base transmitter;

    synchronization circuitry receiving the timing signals and providing a spread spectrum frequency-hopping sequence characteristic of the particular remote unit;

    a mobile transmitter producing a radiated frequency-hopped signal responsive to the frequency-hopping sequence and the timing signal; and

    a message generator operative to modify the radiated frequency-hopped signal to transmit a message to at least one base station.

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