I don’t know, I have been looking at FreeSwitch lately. I also just stumbled onto RestApps and using the EPM to do the hot desking. I have Yealink T26 phones so I need to figure out how they will play into this. If I stay with Fpbx I am considering building a new box and using the new version of Fpbx with Asterisk 13. Might be a shorter learning curve anyway.