Communication system

Details Communication system Communication system

2006-02-07

2006-02-07

Harold, Jefferey F. (Department: 2646)

Telephonic communications

Supervisory or control line signaling

Substation originated

C379S355020, C379S093010, C379S093050

Reexamination Certificate

active

06996226

ABSTRACT:
An object of the invention is to provide a communication system that enables telephone communications to be quickly performed by a simple operation. A user activates a telephone directory application program on a PDA terminal, and the PDA terminal transmits a destination telephone number to a gateway together with a request for initiation of a call to that destination telephone number and an IP address of a NET telephone terminal that the user desires to use. When an off-hook condition of the NET telephone terminal is detected, the gateway initiates a call to the previously received telephone number and establishes a communication link to a destination NET telephone terminal accommodated in a digital public telephone network. The communication link can be established in the same manner even if the destination telephone terminal is an ordinary telephone terminal accommodated in a public telephone network.

REFERENCES:
patent: 6738643 (2004-05-01), Harris
patent: 6871212 (2005-03-01), Khouri et al.
patent: 2002/0080930 (2002-06-01), Cho
patent: 2004/0205151 (2004-10-01), Sprigg et al.
patent: 2004/0218739 (2004-11-01), Nicol
patent: 10-336304 (1998-12-01), None
patent: 11-41294 (1999-02-01), None
patent: 2001-127902 (2001-02-01), None

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