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  Issabel Server : Asterisk PBX Issabel is Powered By Asterisk. Issabel is an Open Source Software that 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, videoconference, recording, reports and more. And it is free,download it from www.issabel.org All of ChinaRoby's Asterisk cards can wok with Issabel. With Issabel and ChinaRoby's Asterisk cards,users can build an Asterisk IP PBX ,VoIP Phone System,call centre,Issabel server for home / businesses / hotels / schools ...

  Freepbx Server : Asterisk PBX Freepbx is based on Asterisk which is an Open Source Software of phone system. Freepbx is an Open Source Software that 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, videoconference, recording, reports and more. And it is free,download it from www.Freepbx.org All of Asterisk cards (FXS FXO cards and ISDN PRI E1 cards) can wok with Freepbx,that is also an Open Source Software,so,users can edit the code to meet the need. And the features and function is powerful.  With Freepbx and ChinaRoby's Asterisk cards,users can build an Asterisk VoIP PBX ,VoIP Phone System,call centre,Freepbx server for home / businesses / hotels / schools ...