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Localization of call routing for TDM sets in an IP network

  • US 7,333,480 B1
  • Filed: 09/20/2004
  • Issued: 02/19/2008
  • Est. Priority Date: 09/20/2004
  • Status: Active Grant
First Claim
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1. A method of routing a call request from a time-division multiplexed (TDM) set, the TDM set being connected to an IP network through an IP media gateway, the IP network including a central call server for controlling the IP media gateway and routing calls in the IP network, the IP network including a plurality of edge gateways connecting the IP network to a public switched telephone network (PSTN), the method comprising the steps of:

  • receiving a signalling message at the central call server from the IP media gateway, said signalling message identifying a call from the TDM set;

    identifying a geographic zone associated with the IP media gateway;

    selecting one of the edge gateways based upon said geographic zone; and

    sending the IP media gateway routing information for routing said call to said selected edge gateway.

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