[LAU] Phone to computer adaptor

[Len Ovens]

On Mon, 21 Jul 2014, Bob van der Poel wrote:

> I currently have a "skype" phone connected to USB which works just fine to make
> calls. Only problem is that the cord is short :) and the quality is not the
> greatest.
> 
> So, can I connect a regular POTS phone via a USB thing? What are they called and
> do they work with Linux? I assume that the skype phone just acts like a soundcard
> ... same with what I want?

Plug it in and see what differences it makes to arecord -l and aplay -l

POTS phone:
- expects a dc voltage across the line. Not so phantom, phantom power...
- expects 600ohm match... depends on how old it is though, newer may be 
less picky
- runs audio both ways on the same line... this may be more difficult to 
deal with. (echo cancelling)

Better to use two separate lines... prolly what the skype handset does.


--
Len Ovens
www.ovenwerks.net