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Apparatus and method for storing and transmitting data between a computer, a facsimile machine and a telephone network

  • US 5,790,640 A
  • Filed: 07/31/1996
  • Issued: 08/04/1998
  • Est. Priority Date: 07/31/1996
  • Status: Expired due to Fees
First Claim
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1. A data transfer system for transferring data between a facsimile machine, a telephone network and a computer, the data transfer system comprising:

  • a processing unit coupled to the computer;

    a memory coupled to the processing unit providing a buffer for storing data;

    a facsimile-modem unit for converting data to and from facsimile and modem protocols, the facsimile-modem unit coupled to the processing unit; and

    a line interface unit for selectively coupling the computer, the telephone network, the facsimile machine and the facsimile-modem unit, the line interface unit coupled to the telephone network, the facsimile machine, the facsimile-modem unit, and the processing unit, wherein the line interface unit comprises;

    a first coupling means having a first terminal, a second terminal and a control terminal for selectively coupling the first terminal to the second terminal in response to a signal applied to the control terminal, the first terminal coupled to the telephone network, the second terminal coupled to the facsimile machine and control terminal coupled to the processing unit;

    a second coupling means having a first terminal, a second terminal and a control terminal for selectively coupling the first terminal of the second coupling means to the second terminal of the second coupling means, the first terminal of the second coupling means coupled to the facsimile-modem unit, the second terminal of the second coupling means coupled to the facsimile machine and control terminal of the second coupling means coupled to the processing unit,a transformer and amplifier for converting a signal, the transformer and amplifier coupled between the facsimile machine and the second terminal of the second coupling means;

    a transmitting transformer for converting signals, the transmitting transformer coupled between the line interface unit and the first terminal of the second coupling means; and

    an isolation coupler having a first terminal and a second terminal, the first terminal of the isolation coupler connected to the telephone network and the second terminal of the isolation coupler connected to the processing unit.

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