Using pstn to convey participant ip addresses for multimedia...

Details Using pstn to convey participant ip addresses for multimedia... Using pstn to convey participant ip addresses for multimedia...

H - Electricity

04

L

H04L 12/66 (2006.01) H04L 29/06 (2006.01) H04M 3/56 (2006.01) H04M 7/00 (2006.01) H04N 7/15 (2006.01)

Patent

CA 2371192

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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