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    a_star17's Avatar
    a_star17 Posts: 1, Reputation: 1
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    #1

    Mar 29, 2009, 04:57 PM
    Function of red wire in phone cord?
    Hi there, I'm just wondering what the function of the red wire is in a telephone cord?
    KISS's Avatar
    KISS Posts: 12,510, Reputation: 839
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    #2

    Mar 29, 2009, 05:34 PM

    At the present time grn/red is line 1 and blk/yel is line #2.

    You need 2 wires to complete a circuit.

    Way back when the blk/yel pair used to provide power to "princess phones" which had a lighted dial.
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