Network-based telephony gateway and network-based telephony...

Details Network-based telephony gateway and network-based telephony... Network-based telephony gateway and network-based telephony...

2005-05-10

2005-05-10

Vu, Huy D. (Department: 2665)

Multiplex communications

Pathfinding or routing

Combined circuit switching and packet switching

C370S352000

Reexamination Certificate

active

06891827

ABSTRACT:
An Internet telephony gateway that connects a PSTN with an IP network and a method for operating the Internet telephony gateway are disclosed. When abnormal services due to matching between networks are interrupted, the Internet telephony gateway performs a flow for terminating a call with a corresponding subscriber terminal unit using an internal failure alarm system. The flow includes a message of a failure alarm, a tone, and an announcement.

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patent: 5754526 (1998-05-01), Kaneko et al.
patent: 5761312 (1998-06-01), Zelikovitz et al.
patent: 5867494 (1999-02-01), Krishnaswamy et al.
patent: 6411679 (2002-06-01), Khasnabish
patent: 6574335 (2003-06-01), Kalmanek et al.

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