Yesterday, I have published in OKay's RPM repository RPMs for FusionPBX 4.0. FusionPBX is an open source FreeSWITCH GUI. FusionPBX can be used as a high available single or domain based multi-tenant PBX, carrier-grade switch, call center server, fax server, VoIP server, voicemail server, conference server, voice application server, appliance framework and more. FreeSWITCHtm is a highly scalable, multi-threaded, multi-platform communication platform. FusionPBX license is the MPL 1.1 license.
My RPM included some patches that for a reason the author didn't accept, including PHP 5.3 support (as Centos 6 still have it, and not everybody has updated). This RPM will install MySQL (for CentOS 6) or MariaDB (for Centos 7) as the database backend, all possible information will be stored there, such as dial plans, profile information, registrations and so on. Installation is already configured as multi-tenant.
As a premium add-on, installation using this RPM includes the LCR and Billing for FusionPBX in-app. You just need to activate it and start configuring.
RPM's are available for Centos 6 and 7. And you can find it if you type yum search fusionpbx.