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Dual port interface for a computer-based multifunction personal communication system

  • US 5,619,508 A
  • Filed: 03/23/1995
  • Issued: 04/08/1997
  • Est. Priority Date: 01/08/1993
  • Status: Expired due to Term
First Claim
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1. A communication apparatus, comprising:

  • data interface connected a personal computer;

    first telephone line interface means for connection to a first telephone line;

    second telephone line interface means for connection to a second telephone line;

    telephone device means for receiving local voice signals from a local user and for conveying remote voice signals from a remote user to the local user;

    full-duplex conversion means connected to the telephone device means for converting the local voice signals into outgoing digital voice data and for converting incoming digital voice data into the remote voice signals;

    voice compression means connected to the full-duplex conversion means for compressing the outgoing digital voice data into compressed outgoing digital voice data and for decompressing compressed incoming digital voice data into the incoming digital voice data;

    main control means connected to the voice compression means, the data interface, the first telephone line interface means and the second telephone line interface means, forreceiving the compressed outgoing digital voice data from the voice compression means,receiving outgoing computer digital data from the personal computer through the data interface,multiplexing and transmitting compressed outgoing digital voice data with the outgoing computer digital data to the first telephone line interface means for transmission on the first telephone line,receiving and demultiplexing compressed incoming digital voice data and incoming computer digital data from the first telephone line interface means from the first telephone line, andpassing the remote voice signals to the second telephone line interface means for transmission on the second telephone line.

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