NETWORK CONNECTION DEVICE, COMMUNICATION SYSTEM, COMMUNICATION METHOD, COMMUNICATION PROGRAM, AND RECORDING MEDIUM

WIPO Patent Application WO/2003/026264

A1

When a first analog telephone (101S) makes a telephone call to a second analog telephone (101R) through a public telephone network (107), a second Internet connection device (103R) detects the telephone call, stores the telephone number of the first analog telephone (101S), includes the calling part telephone number and the called part telephone number in an IP packet, and sends the packet addressed to a predetermined multicast address to the Internet (105). A first Internet connection device (103S) having received the IP packet cuts off the call and sends the IP packet to the called part IP address through the Internet (105). Thus, both the Internet connection devices (103S, 103R) are allowed to recognize the IP addresses of the calling and called parts so as to set up a conversation through the Internet (105). Thus, an Internet telephone system is build with a simpler means&sol structure, and the speech quality is maintained.

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March 27, 2003

June 06, 2002

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MATSUSHITA ELECTRIC IND CO LTD (JP)
NAKAMOTO SHINJI (JP)

H04L45/24; H04M3/42; H04M7/00; H04L12/66; H04M11/00; (IPC1-7): H04M11/00; H04L12/56; H04M3/00

JPH11122388A	1999-04-30
JP2001177663A	2001-06-29

Oguri, Shohei (ARK Mori Building 12-32 Akasaka 1-chome Minato-ku, Tokyo, JP)

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