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Data communication device

  • US 5,134,644 A
  • Filed: 08/17/1990
  • Issued: 07/28/1992
  • Est. Priority Date: 08/17/1990
  • Status: Expired due to Term
First Claim
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1. A communications system for use with an existing panel of the type which uses a telephone line as its primary communications path, the communications system providing the existing panel with a radio-frequency primary communications path, the communications system comprising:

  • a communications panel, including first transceiver means for use in the radio-frequency primary communications path, the communications panel adapted for receiving one or more desired conditions from one or more geographical areas, for transmitting the desired condition information and a control signal, and for receiving a control signal, over a predetermined radio frequency, the communications panel also including means for generating electrical signals; and

    a telephone intercept connected to the communication panel, the telephone intercept adapted for connection to the existing panel, and communicating appropriate electrical signals generated by the communications panel to make the communications panel transparent to the existing panel,whereby the communications system communicates the data and control signals of the existing panel through the radio-frequency primary communications path and is transparent to the existing panel.

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