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Automatic updating of a local database supporting local number portability

  • US 5,910,981 A
  • Filed: 03/26/1997
  • Issued: 06/08/1999
  • Est. Priority Date: 03/26/1997
  • Status: Expired due to Term
First Claim
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1. In a telecommunications network having a centralized local number portability database, a method of processing a telephone call directed to a terminating switch which does not serve a called directory number comprising the steps of:

  • accessing a database within a switch for routing said call;

    routing said call in accordance with data provided from said database within said switch;

    responsive to detecting that said terminating switch does not serve said called directory number, generating a release message for said call, said release message having a cause code indicating that no line has been found corresponding to a directory number of said call in the switch transmitting said release message;

    responsive to receiving said release message, comparing a response received from said centralized local number portability database shared by a plurality of switches with data of said database within said switch; and

    if the two data quantities do not match, routing the call in accordance with the data received from said centralized local number portability database and updating the database within said switch with data of said local number portability database.

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