Freepbx is based on Asterisk which is an Open Source PBX software.
Freepbx , an Open Source Software , brings together IP Communications Services in one place
It's a platform that simplifies the management of your business interaction channels, incorporating a Telephone exchange (VoIP) with email, CRM, fax,firewall,CRM, videoconference, recording, reports and more.
And it is free,download it from www.Freepbx.org
All of ChinaRoby's Asterisk cards can wok with Freepbx.
With Freepbx and ChinaRoby's Asterisk cards,users can build an Asterisk IP PBX,VoIP Phone System,call centre,Freepbx server for home / businesses / hotels / schools ...