Method and apparatus for PSTN-based IP active call recovery...

Details Method and apparatus for PSTN-based IP active call recovery... Method and apparatus for PSTN-based IP active call recovery...

2011-08-02

2011-08-02

Smith, Creighton (Department: 2614)

Multiplex communications

Pathfinding or routing

Combined circuit switching and packet switching

C370S395210, C370S252000

Reexamination Certificate

active

07990955

ABSTRACT:
A method and system for rerouting IP telephony call information. The system includes an existing IP telephony call, the telephony call originating at a first IP telephony phone. A second IP telephony phone receiving the IP telephony call from the first IP phone and a network routing condition, the routing condition causing the IP telephony call to be rerouted. A switchover instruction, the switchover instruction initiating a switchover of the existing IP telephony call to a PSTN.

REFERENCES:
patent: 6389005 (2002-05-01), Cruickshank
patent: 6665293 (2003-12-01), Thornton
patent: 6956816 (2005-10-01), Cedell
patent: 7016343 (2006-03-01), Mermel
patent: 7120122 (2006-10-01), Starr et al.
patent: 2004/0085894 (2004-05-01), Wang

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