Miata Mailing List: December 1999, Message #491

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I'm about to install my handsfree phone kit into my new toy, and was
wondering if the factory stereo has provision for automatically muting
the stereo when the phone is off-hook.  The phone kit provides a signal
wire that's earthed when the phone is in use, and I know that many
modern car stereos accept such an input, but I don't know if the Mazda
unit is one of them.

Can anyone confirm or deny whether it has such a provision, and if so,
which wire?

Cheers,
Jon Etkins
Miata 10AE #1407
Texas Spokes BS38