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Data dial system and method

  • US 5,390,240 A
  • Filed: 10/08/1992
  • Issued: 02/14/1995
  • Est. Priority Date: 10/08/1992
  • Status: Expired due to Term
First Claim
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1. A data dial system comprising:

  • a matrix switch having a first plurality of inputs, a first plurality of outputs, a second plurality of inputs and a second plurality of outputs, wherein a first input of the first plurality of inputs, responsive to a first control signal, connects to at least one of the first plurality of outputs, and a first output of the second plurality of outputs, responsive to the first control signal, connects to one of the second plurality of inputs, respectively, and wherein said matrix switch, responsive to a second control signal, disconnects the first input from the connected one of the first plurality of outputs, and disconnects the first output from the connected one of the second plurality of inputs, respectively;

    a plurality of user terminals, with each of said plurality of user terminals operatively coupled to one of the first plurality of inputs and to one of the second plurality of outputs, respectively;

    a plurality of "Touch-Tone" push button telephones, with each of said plurality of "Touch-Tone" push button telephones having a dual-tone-multiple-frequency (DTMF) keypad for generating DTMF signals;

    a dial tone generator, coupled to each of said plurality of "Touch-Tone" push button telephones, for providing a direct current biasing level for operating each of said plurality of "Touch-Tone" push button telephones;

    a DTMF-ASCII converter, operatively coupled to said dial tone generator and responsive to each DTMF signal, for converting each DTMF signal to an ASCII signal; and

    a processor, operatively coupled to said matrix switch and to said DTMF-ASCII converter, responsive to a first ASCII signal, for generating the first control signal for connecting the first input to at least one of the first plurality of outputs and for connecting the first output to one of the second plurality of inputs, and responsive to a second ASCII signal, for generating the second control signal for disconnecting the first input and the first output.

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