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Gateway system that relays data via a PBX to a computer connected to a pots and a computer connected to an extension telephone and a lanand a method for controlling same

  • US 5,636,218 A
  • Filed: 10/17/1995
  • Issued: 06/03/1997
  • Est. Priority Date: 12/07/1994
  • Status: Expired due to Fees
First Claim
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1. A gateway system, which relays data, via a private branch exchange, to an outside information processing unit on a plain old telephone system and to an information processing unit that is connected to an internal extension telephone system and a LAN, comprising:

  • a modem for demodulating a packet that is received via said plain old telephone system and for modulating and transmitting a packet to said plain old telephone system, and for dialing an outside telephone line;

    multiplex/demultiplex means for multiplexing voice data and computer data to form a packet, and for demultiplexing a packet to acquire voice data and computer data separately;

    signal processing means for coding or decoding said voice data;

    AD/DA conversion means for performing digital-analog or analog-digital conversion on said voice data;

    dial means for dialing an extension line via said private branch exchange; and

    a LAN adaptor for exchanging computer data via said LAN.

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