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Geographically distributed telephony

  • US 6,411,703 B1
  • Filed: 02/09/1998
  • Issued: 06/25/2002
  • Est. Priority Date: 09/27/1997
  • Status: Expired due to Term
First Claim
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1. A geographically distributed telephony switching system for providing telephone number portability within said switching system while conserving at least transmission facilities between switching nodes of the system, comprising:

  • (a) database means for storing ported telephone numbers and new switching node numbers corresponding thereto; and

    (b) trigger means at least at one switching node for providing a release message with cause to said database means to effect retrieval of a new switching node number corresponding to a ported telephone number.

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