System and method for maintaining a communication session...

Details System and method for maintaining a communication session... System and method for maintaining a communication session...

2005-12-06

2005-12-06

Ngo, Ricky (Department: 2663)

Multiplex communications

Fault recovery

Bypass an inoperative switch or inoperative element of a...

C370S352000, C370S401000, C370S410000, C714S002000, C714S025000

Reexamination Certificate

active

06973027

ABSTRACT:
The present invention provides a method for maintaining a communication session between telephony devices, which includes establishing a first TCP/IP signaling communication link between a first telephony device and a proxy. The first TCP/IP signaling communication link is operable to communicate first keep alive signals between the proxy and the first telephony device. A second TCP/IP signaling communication link is established between a primary gatekeeper and the proxy. The second TCP/IP signaling communication link is operable to communicate second keep alive signals between the proxy and the primary gatekeeper. The first and second TCP/IP signaling communication links are terminated at the proxy. Therefore, a communication session between the first telephony device and a second telephony device may be maintained even if the second keep alive signals are interrupted.

REFERENCES:
patent: 6363065 (2002-03-01), Thornton et al.
patent: 6625256 (2003-09-01), Tasker et al.
patent: 6674713 (2004-01-01), Berg et al.
patent: 6738343 (2004-05-01), Shaffer et al.
patent: 6785223 (2004-08-01), Korpi et al.

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