AsteriskNow PBX

http://www.asterisk.org/asterisknow

http://ronnybull.com/2011/08/14/asterisknow-polycom-soundpoint-ip-335-550-provisioning-in-freepbx

http://ronnybull.com/2011/08/16/asterisknow-iptables-firewall-configuration

AsteriskNow:

• Is free
• From Digium
• Based on CentOS Linux
• Available in 32-bit or 64-bit
• A bootable .iso
• Includes support for the Digium phones