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Credit control system for long distance telephone services

  • US 5,068,891 A
  • Filed: 05/31/1989
  • Issued: 11/26/1991
  • Est. Priority Date: 05/31/1989
  • Status: Expired due to Term
First Claim
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1. A method for preventing telephone travel card abuse, comprising the steps of:

  • capturing data transmitted by a conventional, pre-existing switching equipment means, including information concerning the temporal length of a long distance telephone call, immediately upon completion of the call;

    said step of capturing data including the step of capturing said data as it is transmitted between a switching equipment means and an internal buffer means;

    immediately transmitting the captured data to a monitoring means;

    immediately subtracting the temporal length of the call from the amount of time available to the caller as determined by the caller'"'"'s line of credit; and

    immediately invalidating the caller'"'"'s travel card account number if no amount of time is available to the caller after said subtraction.

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