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Voice conference call using PSTN and internet networks

DC
  • US 9,843,612 B2
  • Filed: 12/30/2015
  • Issued: 12/12/2017
  • Est. Priority Date: 03/10/2003
  • Status: Expired due to Fees
First Claim
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1. A method for establishing a secure multi-participant conference call including full duplex audio, the method comprising:

  • initiating a dial-out process to establish a connection with a Public Switched Telephone Network (PSTN) client in response to a local moderator client selecting the PSTN client;

    receiving first audio data at the local moderator client from the PSTN client through a PSTN gateway;

    receiving second audio data at the local moderator client from a remote client through a Virtual Private Network (VPN) tunnel;

    transmitting third audio data, first video data, and first collaboration data from the local moderator client to the remote client through the first VPN tunnel; and

    transmitting fourth audio data from the local moderator client to the PSTN client through the PSTN gateway.

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