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...

2005-12-27

2005-12-27

Lim, Krisna (Department: 2153)

Electrical computers and digital processing systems: multicomput

Computer conferencing

C709S205000, C379S202010, C348S014080, C370S260000

Reexamination Certificate

active

06981022

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.

REFERENCES:
patent: 6671262 (2003-12-01), Kung et al.
patent: 6728784 (2004-04-01), Mattaway
patent: 6785246 (2004-08-01), Foti
patent: 2001/0056466 (2001-12-01), Thomspon et al.
patent: 2002/0107923 (2002-08-01), Chu et al.
patent: 2003/0014488 (2003-01-01), Dalal et al.
patent: 2004/0022235 (2004-02-01), Vaziri et al.

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