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Method for providing location/geographic portability in a system having different service providers within a common numbering plan area

  • US 5,970,131 A
  • Filed: 06/30/1995
  • Issued: 10/19/1999
  • Est. Priority Date: 06/30/1995
  • Status: Expired due to Fees
First Claim
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1. A method for routing a call placed by a calling Party to a called Subscriber, the called Subscriber having been assigned a directory number NPA-NXX-XXXX, and having moved to a different location served by a switch having a different exchange code, NYY, where NPA is a Numbering Plan Area, comprising the steps of:

  • (a) providing a database storing a relationship between the directory number assigned to the called Subscriber, the different exchange code NYY and a line code YYYY serving the called Subscriber, and a Service Provider Area (SPA) code identifying a Local Service Provider of the called Subscriber;

    (b) converting, in the database, the called Subscriber'"'"'s directory number, NPA-NXX-XXXX, into SPA-NYY-YYYY; and

    (c) routing the call placed by the calling party to the called Subscriber using SPA-NYY-YYYY.

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