Providing real-time voice communication between devices connected to an internet protocol network and devices connected to a public switched telephone network

  • US 8,724,643 B2
  • Filed: 01/18/2012
  • Issued: 05/13/2014
  • Est. Priority Date: 01/07/2000
  • Status: Expired due to Term
First Claim
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1. A system for providing real-time voice communication between devices connected to an Internet Protocol (IP) network and devices connected to a public switched telephone network (PSTN) having voice circuits, the system comprising:

  • a computer controlled switch operable for use by a plurality of subscribers and adapted for connection to a local public switched telephone network, receiving calls from the IP network and the PSTN, and routing calls to the PSTN and the IP network; and

    gate interface circuitry connected to the computer controlled switch and adapted for connection to the IP network,wherein the gate interface circuitry includes gateway circuitry for interfacing between the IP network and the voice circuits of the PSTN, and gatekeeper circuitry for performing address translation, admission control, bandwidth management and zone management between the IP network and the PSTN;

    the computer controlled switch storing, for each subscriber of the plurality of subscribers, at least one destination address on the PSTN and at least one destination address on the IP network, the computer controlled switch being operable to route an incoming call from the IP network or the PSTN for each subscriber of the plurality of subscribers to any one of the destination addresses stored by the computer controlled switch for the subscriber.

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