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Digital teleconferencing control device, system and method

  • US 4,541,087 A
  • Filed: 06/27/1983
  • Issued: 09/10/1985
  • Est. Priority Date: 06/27/1983
  • Status: Expired due to Term
First Claim
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1. A digital teleconferencing control device, comprising:

  • first connecting means adapted to be connected with telephone means capable of providing signals in analog form;

    second connecting means adapted to be connected with highway means capable of carrying signals in digital form; and

    signal processing means connected with said first and second connecting means for receiving analog signals from said first connecting means during a predetermined time period within predetermined time frames, and responsive thereto providing output signals in digital form to said second connecting means unless digital signals are then present on said highway means during said predetermined time period, and for receiving, during preselected time periods within said predetermined time frames with one of said preselected time periods occurring timewise simultaneously with said predetermined time period, a plurality of digital signals from said second connecting means, when such digital signals are present on said highway means during said preselected time periods, for combining said signals at said signal processing means except that digital signals provided to said highway means originating from said first connecting means are precluded from being received and combined with other digital signals at said signals processing means, and responsive thereto providing output signals in analog form indicative of said received digital signals to said first connecting means whereby said control device can be utilized to both place an outgoing digital signal on said highway means and receive incoming digital signals from said highway means during said predetermined time frames to thereby provide apparent simultaneous speaking and listening capabilities at said telephone means.

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