Is it possible to add Freepbx ?
https://www.freepbx.org/
it has a rasbian image
http://www.raspberry-asterisk.org/
Nice Work!!!
Thank You 
Is it possible to add Freepbx ?
https://www.freepbx.org/
it has a rasbian image
http://www.raspberry-asterisk.org/
Nice Work!!!
Thank You