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Cullmann Telephone adaptor

Discussion in 'A3/S3 Forum (8L Chassis)' started by mozinelle, Jul 22, 2005.

  1. mozinelle
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    mozinelle New Member

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    [Jul 22, 2005]
    Hi, First post here.

    I have an A3 TDI pre-facelift (just) that came with the integrated telephone system (concert HU, with Cullman adaptor for Siemens c45).

    The range of these adaptors is pretty limited & they don't do one for the S700i that I got recently. Does anyone know the pin outs of the adaptor cable?

    I was thinking of modifying the adaptor to plug the new phone in but I need to know what that little circuit board inside the adaptor is designed to do.
    Obviously there is a charging circuit, but does it do other things as well (impedance matching etc)?

    If anyone has a circuit diagram (or schematic) for any of these adaptors I would be very grateful.

    Thanks
    Grant
    #1
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