[AusNOG] Hybrid Audio Controller

Peter J. Cherny peterc at luddite.com.au
Mon Feb 23 17:43:25 EST 2015


On 02/23/15 17:30, Ben Hohnke wrote:
> Handset to handpeice is normally just raw audio. You can techinically
> crimp on 2 x 3.5mm audio jack and plug it into a normal mic port, and
> you'll have the audio in and out feeds.

Not advise that should be acted on !

At worst, you need transformer isolation,
at best a purpose build interface.
The radio world solved these issues at least 75 years ago.

Maybe just google "telephone hybrid balanced"
inter-alia www.tbu-ip.com for a modern solution.


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