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    Coors5117's Avatar
    Coors5117 Posts: 1, Reputation: 1
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    #1

    Dec 9, 2009, 03:59 PM
    3 wire phone line
    I have an older home that is wired with 3 wire telephone line instead of four that the modular jack has. Do I just connect green red and yellow and not worry about the black line I don't have a wire for?
    Stratmando's Avatar
    Stratmando Posts: 11,188, Reputation: 508
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    #2

    Dec 9, 2009, 04:17 PM

    You want to use the red and green for your new jack, cap off the 3rd wire.
    Line 1 uses red and green, line 2 uses yellow and black.
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