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Paging method and apparatus

  • US 20020128016A1
  • Filed: 05/02/2001
  • Published: 09/12/2002
  • Est. Priority Date: 06/24/1994
  • Status: Active Grant
First Claim
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1. A method of operating a paging system, the paging system including a central control station and a paging unit, the method comprising:

  • transmitting, on a first frequency, a clock-aligning signal from the central control station to the paging unit;

    transmitting, on a second frequency, a pager command and alphanumeric data from the central control station to the paging unit;

    transmitting, on a third frequency, and in response to the pager command, pager status data and alphanumeric data from the paging unit to the central control station;

    transmitting, on a fourth frequency, a pager transmission request signal from the paging unit to the central control station, the pager transmission request signal being transmitted in a predetermined time slot assigned to the paging unit, the predetermined time slot being related to the clock-aligning signal and assigned whereby the fourth frequency is utilizable by a plurality of other paging units;

    wherein the first frequency, second frequency, third frequency, and fourth frequency differ from one another.

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