VOIP

http://www.3cx.com/

www.3cx.com

3CX VoIP PBX is an easy to use, plug and play SIP - IP PBX for Windows. Save on PBX maintenance and halve your phone bill. Download the Free edition today.

3CX Phone System for Windows is a software-based IP PBX that r ...

Visited81
http://www.asterisk.org/

www.asterisk.org

Asterisk is an open source framework for building communications applications. Asterisk turns an ordinary computer into a communications server. Asterisk powers IP PBX systems, ...

https://www.freepbx.org/

www.freepbx.org

FreePBX is a web-based open source GUI (graphical user interface) that controls and manages Asterisk (PBX), an open source communication server. FreePBX is licensed under the GNU General Public License (GPL), an open source license. FreePBX can be inst ...

Visited70
https://freeswitch.org/

freeswitch.org

FreeSWITCH is a scalable open source cross-platform telephony platform designed to route and interconnect popular communication protocols using audio, video, text or any other form of media.  It was created in 2006 to fill the void left by proprie ...

Visited59
http://www.fusionpbx.com/

www.fusionpbx.com

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 ser ...

Visited60
http://www.officesip.com/

www.officesip.com

Office SIP Server is open source PBX, VoIP, Instant Messaging server.

OfficeSIP Server is designed for modern offices and runs on any Windows PC. No crippled command line and no config files to fine-tune. Install and configure OfficeSIP Server ...

Visited117
http://www.zoiper.com/en

www.zoiper.com/en

Zoiper, the free softphone to make VoIP calls through your PBX or favorite SIP provider. Available for iPhone, Android, WP8, windows mac and linux.

Our VoIP softphone will look everywhere for your contacts and will display them in a combined li ...

Visited100