Using PSTN to convey participant IP addresses for multimedia conferencing
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United States of America Patent
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Dec 27, 2005
Grant Date -
May 8, 2003
app pub date -
Nov 2, 2001
filing date -
Nov 2, 2001
priority date (Note) -
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Abstract
An IP/PSTN hybrid multimedia conferencing system in which standard telephone and user station participants establish voice communications over the PSTN, and then exchange IP addresses in-band over the PSTN. User stations then negotiate capabilities over the IP network. All users can participate at a base voice level over the PSTN while user stations can also establish extra-audio media streams over an IP network.
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