microphone on C700

Hi,

I dusted off my (old) C700 and installed openzaurus on it. I'm planning
to use only console apps and got lot's of eyecandy running;-)
Now I want to use a softphone to connect to my asterisk server to make
free calls. I build the console-only version of linphone, it connects
and I can listen to my voicemail, great !
Only the microphone is not working, or I don't know how to test it. I
soldered myself a 3,5mm jack on a 2,5mm headset and tried to record
something with arecord but didn't suceed.
I really don't know what's going on, it might be my soldering qualities,
the mixer settings or alsa failing ?

Is it possible do to full-duplex audio on the C700 ?
Should a cheap GMS-headset work on it ?
Anyone with microphone experience combined with console apps ?

Please advise,

Jeroen

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