[SML] Audio from landline phone mic

[Greg Bierly]

And V3.0 could add an audio output.

Greg Bierly

> On Oct 16, 2023, at 5:51 PM, Nigel Worsley via Stagecraft <stagecraft at theatrical.net> wrote:
> 
> Just a ringer. One of my aspirational projects is to make the ultimate
> phone ringer: ring frequencies, cadences and call progress tones for
> all known countries along with a built-in hybrid and MSC control. And
> then I can move on to the two port version that allows two stage
> phones to call each other as well :)
> 
> Nigel Worsley

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