Sangoma FreePBX

FreePBX offers organizations an all-in-one IP PBX that is freely available to download and install with all the basic elements needed to build a phone system. Sponsored and developed by Sangoma and a robust global community, FreePBX is the most widely-used open-source IP PBX in the world. An intuitive graphical user interface makes taking advantage of the power of Asterisk much easier to deploy and use.