Exchange equipment

Details Exchange equipment Exchange equipment

2004-01-23

2009-02-10

Smith, Creighton H (Department: 2614)

Multiplex communications

Pathfinding or routing

Combined circuit switching and packet switching

C370S401000

Reexamination Certificate

active

07489677

ABSTRACT:
Since in a system of the invention comprising a TU portion1bfor accommodating general extension telephones5and PSTN8, and a TM portion1afor performing a call control with a packet network, call control information from the PSTN8and the like to the packet network is received by the TU portion1band then transferred to the TM portion1aand converted into call control data adapted to the packet network, and voice data from the PSTN8and the like to the packet network is received by the TU portion1band then converted into voice data adapted to the packet work, it is possible to use a packet network such as the Internet, convert voice data into IP packet data and thereby provide a communication service equivalent to a conventional circuit switching service at low cost.

REFERENCES:
patent: 7167486 (2007-01-01), Cornelius et al.
patent: 7239629 (2007-07-01), Olshansky et al.
patent: 7272135 (2007-09-01), Ohtsu et al.
patent: 2003/0072330 (2003-04-01), Yang et al.
patent: 2003/0095542 (2003-05-01), Chang et al.
patent: 11-191791 (1999-07-01), None

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