System and method for routing voice over IP calls

  • US 6,813,264 B2
  • Filed: 11/02/2001
  • Issued: 11/02/2004
  • Est. Priority Date: 11/02/2001
  • Status: Expired due to Fees
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First Claim
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1. A voice over Internet (VOIP) system, comprising:

  • at least one IP-based infrastructure component communicating with at least one wireless originating device;

    at least one SIP server communicating with the infrastructure component; and

    at least one modem bank associated with the SIP server and connected to a PSTN, the SIP server selectively using the modem bank to instantiate a circuit-switched call for encrypted intersystem calls from the originating device to a destination device.

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