Communication method and communication system

Details Communication method and communication system Communication method and communication system

1997-10-30

2000-06-20

Pham, Chi H.

Multiplex communications

Pathfinding or routing

Combined circuit switching and packet switching

370401, 370410, 370466, H04L 1246, H04L 1256

Patent

active

060785837

ABSTRACT:
A communication system and communication method adapted so that the user of one of the communication terminals can more easily communicate with another one connected to the internet through the public network. Connection management servers for relay and manage the communication are provided at nodes between the internet and the public network. Each of the connection management servers assigns an IP address to the communication terminal connected to the internet through the public network, and registers the IP address and the telephone number. When receiving a communication request, the connection management server specifies a communication route to the communication terminal on the basis of the telephone number of the called-side communication terminal set in the communication request. The server checks if the called-side communication terminal is connected to the internet on the basis of the above registration. If it is connected to the internet, the server relays the communication request. If it is not connected thereto, the notice that it is not connected is transmitted to the calling-side communication terminal. If it is not connected yet, the server regards the called-side terminal as having its telephone connected to the telephone channel, and causes speech transmission between that telephone and the calling-side communication terminal.

REFERENCES:
patent: 5351237 (1994-09-01), Shinohara et al.
patent: 5724412 (1998-03-01), Srinivasan
patent: 5828844 (1998-10-01), Civanlar et al.
patent: 5835725 (1998-11-01), Chiang et al.
patent: 5956391 (1999-09-01), Melen et al.
Network Working Group Request for Comments: 1459, J. Oikarinen, et al., May 1993, "Internet Relay Chat Protocol".

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