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Connecting two computers with modems

Discussion in 'Electronic Basics' started by ryan, Feb 18, 2004.

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  1. ryan

    ryan Guest

    I am doing a little science fair project and I need to connect two
    computers together using two dial-up modems, two phones (mic. to spkr.
    and spkr. to mic.), using no phone line, just plain old phone cable. I
    have powered the cables with 9V batteries and can use the phones as
    intercoms, but can I use them to establish a dial-up connection
    between two PCs? The reason I am doing this crazy set up is because I
    plan to hook the mic's and spkr's up to ultrasonic sound converting
    circuits and have the communication be done over air via ultrasonic

  2. Lord Garth

    Lord Garth Guest

    Using your batteries and phone cables, use a modem program such as
    to control the hardware. Set one modem to use originate tones and take it
    off hook by
    sending it an ATH1 command. Send the other to use answer tones and take it
    off hook.

    Get a copy of the Hayes AT commands that nearly every modem uses so you will
    what else you can do.
  3. Si Ballenger

    Si Ballenger Guest

    Run a telephone cable between the two modems. Open terminal
    programs in each computer. In Computer A, send the modem ATX3D.
    In Computer B. send the modem ATA. You probably could echo these
    commands to the com port just by using a batch file.
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