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Data communication cable for a data terminal for simultaneously connecting multiple peripheral devices and selecting the peripheral devices based on data rate

  • US 5,574,947 A
  • Filed: 05/17/1994
  • Issued: 11/12/1996
  • Est. Priority Date: 05/17/1994
  • Status: Expired due to Term
First Claim
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1. A method for simultaneously connecting a data terminal to first and second peripheral devices, and for communicating with one of said first and second peripheral devices while the other of said first and second peripheral devices remains connected, comprising the steps of:

  • providing a transmit data line between a first transmit data conductor on said first peripheral device, a second transmit data conductor on said second peripheral device, and a third transmit data conductor on said data terminal;

    providing a receive data line between a first receive data conductor on said first peripheral device, a second receive data conductor on said second peripheral device, and a third receive data conductor on said data terminal;

    transmitting on said transmit data line transmit data signals from said data terminal to said first and second peripheral devices, said transmit data signals comprising a first characteristic or a second characteristic, said first characteristic comprising a first data rate and said second characteristic comprising a second data rate, said first data rate being different than said second data rate;

    in response to said transmit data signals comprising said first characteristic, transmitting on said receive data line first receive data signals from said first peripheral device to said data terminal, and blocking said first receive data signals from said second receive data conductor on said second peripheral device; and

    in response to said transmit data signals comprising said second characteristic, transmitting on said receive data line second receive data signals from said second peripheral device to said data terminal, and blocking said second receive data signals from said first receive data conductor on said first peripheral device.

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