Thanks for your replay. Could you give me more details about configuring set doorphone unit + Asterisk under Pluto? I think that it'd be useful to have this information. You can post it in wiki.
My idea was to use some IP surveillance camera for video and audio source (some cameras may send and receive voice, if I'm not wrong). But as I understand pluto receive only video, not audio from cameras. Maybe the best way is to use Asterisk + Orbiter softphone for voice and some camera to video. So, basically, we get videophone.