DTMF dial tone


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    Default YouŽll need a wet transformer

    Wet transformers with 600:600 impedance are built to match telephone line Z.
    This kind of transformer allows DC voltage levels to go through their nucleus without being saturated.
    Connect your line to one of this transformers to off-hook
    Last edited by Josuetas; - 11th October 2007 at 23:44.

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