Media based collaboration using mixed-mode PSTN and internet...

Details Media based collaboration using mixed-mode PSTN and internet... Media based collaboration using mixed-mode PSTN and internet...

2004-03-09

2010-02-16

Ni, Suhan (Department: 2614)

Multiplex communications

Special services

Conferencing

C370S352000, C370S354000

Reexamination Certificate

active

07664056

ABSTRACT:
A method which allows standard telephone users to audio conference with video conferencing participants over IP networks in a private secure environment. A dial-out is performed from one or more conference client terminals bridging audio between the Internet and the PSTN networks. The process uses a mixed mode hybrid network architecture for call set-up, initialization and teardown including the method to mix audio at the desktop terminal instead of in a general purpose server as in the prior art. The method conferences video and audio between multiple clients and include audio from a standard telephone network within the conference. A virtual private network connects all of the IP clients together including the voice over IP server used to transcode the proprietary audio into the H.323 standard for transport into the telephony network.

REFERENCES:
patent: 6751477 (2004-06-01), Alperovich et al.
patent: 2003/0137976 (2003-07-01), Zhu et al.

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