Media based collaboration using mixed-mode PSTN and internet networks

  • US 8,339,997 B2
  • Filed: 12/23/2009
  • Issued: 12/25/2012
  • Est. Priority Date: 03/10/2003
  • Status: Expired due to Fees
First Claim
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1. A method for adding a telephone participant to a multi-participant audio-video conference, the method comprising:

  • sending a first message to each of a plurality of multicast appliances over the Internet, wherein the first message comprises a group address which identifies a plurality of participants;

    each of the multicast appliances receiving the first message;

    establishing a plurality of virtual private networks across the Internet routes between the multicast appliances;

    enabling at least one of the participants to communicate in the multi-participant video conferences;

    the telephone participant joining the multi-participant video conference, wherein said joining comprises;

    the telephone participant calling into a gateway server;

    the telephone participant providing conference ID information;

    the gateway server establishing communication with a conferencing server;

    authenticating the telephone participant; and

    transmitting multicast group information to the gateway server;

    wherein the gateway server is operable to use the multicast group information to enable the telephone participant to participate in the multi-participant video conference.

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