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Method and apparatus for transmission of data and voice

  • US 5,793,843 A
  • Filed: 09/28/1994
  • Issued: 08/11/1998
  • Est. Priority Date: 10/31/1989
  • Status: Expired due to Term
First Claim
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1. An apparatus for transmitting data signals over a telephone landline or a cellular telephone system and for transmitting voice signals over the telephone landline or the cellular telephone system, comprising:

  • a modem for converting received digital signals to analog signals and for converting received analog signals to digital signals;

    a data access arrangement operatively connected to said modem and including means to operatively connect to the telephone landline;

    a microcontroller operatively connected to said modem;

    a read-only memory operatively connected to said microcontroller;

    protocol software in said read-only memory in the form of firmware for controlling the operation of the apparatus;

    a cellular telephone interface for connecting said microcontroller to a control unit and a transceiver unit of the cellular telephone;

    means for providing voice communications over the telephone landline or the cellular telephone system;

    a first analog switch for receiving input firm said means for providing voice communications and providing outputs to said data access arrangement and said transceiver unit of said cellular telephone;

    a second analog switch for receiving input from said control unit of said cellular telephone and providing outputs to said data access arrangement and said transceiver unit of said cellular telephone;

    a third analog switch for receiving input from said modem and providing outputs to said data access arrangement and said transceiver unit of said cellular telephone; and

    means to connect data terminal equipment to said microcontroller through an interface.

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