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Method and apparatus using bit maps to access data for processing telephone calls

  • US 5,740,239 A
  • Filed: 09/27/1995
  • Issued: 04/14/1998
  • Est. Priority Date: 09/27/1995
  • Status: Expired due to Fees
First Claim
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1. In a telecommunications network comprising a switching system and a data base shared by a plurality of switching systems, a method of accessing specialized data for processing a call, said call comprising a telephone number for identifying a party of said call, wherein said specialized data is related to said telephone number, said method comprising the steps of:

  • in said switching system, storing a first bit map having one bit per telephone number potentially served by said switching system, used for identifying whether said switching system has said specialized data for serving said call;

    if said first bit map indicates that said switching system has said specialized data for said telephone number available, using said specialized data available in said switching system; and

    if said first bit map indicates that said switching system does not have said specialized data available, accessing said data base to obtain said specialized data for said telephone number.

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