trixbox

[3] trixbox CE, the community edition founded by Kerry Garrison and Andrew Gillis, was completely free and was available under a GPLv2 license.

[4] trixbox CE was last updated with a beta release, and shortly after a blog post was made by Andrew Gillis,[5][6] founder & leader of development stating he was leaving.

[7][8] The FreePBX Project announced the availability of scripts to convert existing end of life trixbox CE systems to a current version of FreePBX, an open source PBX platform with ongoing support and development.

Unlike the community edition it contains components for which the source code is not available.

These extra components are geared towards making the software better able to fulfill the needs of larger companies and call centers.