Voice conference call using PSTN and internet networks

  • US 9,253,332 B2
  • Filed: 11/12/2012
  • Issued: 02/02/2016
  • Est. Priority Date: 03/10/2003
  • Status: Active Grant
First Claim
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1. A method for supporting a multi-participant audio/video conference call, the method comprising:

  • receiving first audio data from a Public Switched Telephone Network (PSTN) client;

    receiving second audio data from a moderator;

    receiving third audio data, video data, and collaboration data from at least one remote client through a first Virtual Private Network (VPN) tunnel;

    mixing the first audio data from the PSTN client with the second audio data from the moderator into a first mixed audio data;

    transmitting the first mixed audio data to the remote client through the first VPN tunnel;

    mixing the second audio data from the moderator with the third audio data from the remote client into a second mixed audio data; and

    transmitting the second mixed audio data to the PSTN client.

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