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In-line text display for telephone terminal employing data filtering

  • US 6,075,841 A
  • Filed: 10/07/1997
  • Issued: 06/13/2000
  • Est. Priority Date: 01/09/1992
  • Status: Expired due to Term
First Claim
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1. A text display system for use with a standard telephone terminal having a means for receiving telephone signals from a telephone line and having a handset, the text display system comprising:

  • an input means for receiving the telephone signals from the telephone line;

    a text attenuation device connected to the input means to receive the telephone signals therefrom and to preferentially obstruct Baudot digital communication tones from passing through the text attenuation device to form a filtered output;

    an output jack providing a connection connected to the telephone terminal for communicating the filtered output received from the text attenuation device with the telephone terminal;

    a demodulator connected to the input means before the text attenuation circuit to convert any text communication at the digital communication tones to digital signals;

    a microprocessor connected to receive the digital signals from the demodulator and to identify any characters encoded in the digital signals; and

    a visually readable display to display the characters identified by the microprocessor, the microprocessor programmed to display on the display the characters as they are received so that text communications received by the system are display to be read by a user.

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