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System and method for passcode validation during telephone call processing

  • US 6,788,775 B1
  • Filed: 12/11/2000
  • Issued: 09/07/2004
  • Est. Priority Date: 12/11/2000
  • Status: Expired due to Fees
First Claim
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1. A method of validating a passcode in a telecommunications network which processes a call from a first telephone station, said method comprising the acts of:

  • receiving a passcode from said first telephone station;

    computing a first value based on a telephone number;

    retrieving a second value from an exception table based on said first value;

    determining that the received passcode is the same as said second value; and

    permitting access to a restricted service, wherein said exception table comprises a plurality of segments indexed by a numbering plan area, each of said segments comprising a plurality of storage locations, and wherein said retrieving act comprises;

    identifying a first of said plurality of segments based on the area code of said telephone number;

    identifying a first storage location within said first segment based on said first value; and

    retrieving said second value from said first storage location.

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