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Eircom phone line polarity?

  • 19-07-2013 9:30am
    #1
    Kencollins
    Registered Users, Registered Users 2 Posts: 567 ✭✭✭


    Hi all,

    The kids had a field day this morning and pulled out the wires from the junction box inside the front door.

    The junction box links the cable coming into the house (two wires, white and blue solid colours) to the master socket (two wires, white and blue, dashed colours)

    Common sense would say white to white, blue to blue BUT there are instructions hand written inside the master socket saying the opposite.

    I got out the good old multimeter earlier, and it reads 52V, with the + on the white wire.

    Can anyone tell me which terminal inside the master socket should have the + voltage, L1 or L2?

    Thanks,

    Ken


Comments

  • #2
    Xantia
    Registered Users, Registered Users 2 Posts: 682 ✭✭✭Xantia


    Hi,
    It does not matter at all.
    The telephone(s) that are connected will sort that out with polarity fixing diodes if required.
    Clean back to the bare copper as you are at it and screw them down.


  • #3
    ZENER
    Registered Users, Registered Users 2 Posts: 6,163 ✭✭✭ZENER


    All phones have a bridge rectifier in them to sort out polarity issues so the connections don't matter. Your phone should work regardless.

    Ken


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