pbx recco

[thilo.bangert at gmail.com (Thilo Bangert)]

yate hasnt been mentioned, which i am using successfully in multiple roles.

http://yate.null.ro/pmwiki/

they have a distro similar to freepbx at http://www.freesentral.com/

however, we are currently evaluating sip:provider CE, which may be more than 
you need, but definitively worth a look.

http://www.sipwise.com/products/spce/

its an open source softswitch implementation, which has made tremendous 
progress in recent releases.

kind regards
Thilo