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System and method for voice over internet protocol (VoIP) and facsimile over internet protocol (FoIP) calling over the internet

  • US 20040047345A1
  • Filed: 08/25/2003
  • Published: 03/11/2004
  • Est. Priority Date: 11/16/2001
  • Status: Active Grant
First Claim
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1. A method for routing telephone calls over the Internet between an originating gateway and a destination gateway, comprising:

  • selecting a destination gateway that is capable of routing a telephone call to a destination telephone;

    selecting an optimal route from a plurality of routes, wherein each route includes an originating gateway capable of sending data packets to the selected destination gateway, and wherein the originating gateway on the optimal route comprises a source gateway; and

    inserting header data into digital data packets containing a call setup request, wherein the header data ensures that data packets containing a failed call setup request are returned to the source gateway, regardless of which gateway acts as the originating gateway.

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