Multiplex communications – Pathfinding or routing – Switching a message which includes an address header
Patent
1995-10-17
1997-06-03
Kizou, Hassan
Multiplex communications
Pathfinding or routing
Switching a message which includes an address header
370260, H04L 1246, H04L 1256
Patent
active
056362188
ABSTRACT:
Disclosed is a gateway system and method for controlling same which allows a video conference to be held with a participant (node) being on a plain old telephone system by using a conventional private telephone system and a LAN. The gateway system relays data, via a private branch exchange, to an information processing unit that is on an external plain old telephone system, and an information processing unit that is connected to an extension telephone and a LAN. The system includes a modem for receiving a call from, or transmitting a call to, the plain old telephone system, and for modulating and demodulating a signal. A multiplexer/demultiplexer is used to multiplex voice information and computer data to prepare a packet, or demultiplex a packet to acquire voice data and computer data separately. A LAN adaptor is used for transmitting and receiving computer data via the LAN. A dialer is provided for making a call to an extension telephone and a digital signal processor is used for coding and decoding voice data. An AD/DA converter is provided for performing analog-to-digital or digital-to-analog conversion on the voice data.
REFERENCES:
patent: 5355365 (1994-10-01), Bhat et al.
patent: 5483588 (1996-01-01), Eaton et al.
patent: 5519705 (1996-05-01), Fukutomi
patent: 5526354 (1996-06-01), Barraclough et al.
Iida Seita
Ishikawa Katsuya
International Business Machines - Corporation
Kizou Hassan
Magistrale Anthony N.
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