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Cellular phone accounting system

  • US 5,325,418 A
  • Filed: 09/27/1991
  • Issued: 06/28/1994
  • Est. Priority Date: 09/27/1991
  • Status: Expired due to Term
First Claim
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1. A cellular telephone accounting system comprising:

  • a) a central processing unit;

    b) at least one cellular telephone unit for making telephone calls, the cellular telephone unit having a real-time clock chip;

    c) a telephone interlink receiver employed in conjunction with the telephone unit and the central processing unit with communication means for communicating between the telephone unit and the central processing unit, the interlink receiver communication means including,1) a microprocessor in the interlink receiver;

    2) interface means in the interlink receiver for interfacing the telephone unit with said microprocessor and receiving data signals from the telephone unit;

    3) communicating means for interfacing the central processing unit with the microprocessor, including a port recognizable by the central processing unit, and receiving data signals from the microprocessor, wherein data signals are received by said microprocessor from the telephone unit and data signals are received by the central processing unit from said microprocessor; and

    4) translation means for establishing protocol relative to data signals received from the telephone unit to permit communication of said telephone unit data signals to said microprocessor and to the central processing unit, wherein said translation means includes a program and wherein the telephone unit has call identification and recording means for identifying telephone calls and the time, date and duration of telephone calls as clocked by the real-time clock chip made from the telephone unit with identifying call data and recording the identifying call data in the telephone unit, wherein the telephone interlink receiver communicates the identifying call data to the central processing unit for accounting.

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