Asterisk is the world’s most popular open source telephony engine. AsteriskExchange™ is the online marketplace for products built on or integrated with Asterisk.
Open Source Distros
PBX in a Flash
With PBX in a flash, you'll have a high-performance turnkey PBX that's easy to upgrade. Once you have your system installed, you'll have a fully functional server with the latest Debian Linux operating system, plus 3CX Phone System V15.5. 3CX V15.5 is a complete unified communications platform which includes desktop clients for Windows and Mac and smartphone clients for iOS and Android. You’ll also have video conferencing for all users. PBXinaflash is easy to install - IP Phones, Trunks and gateways will be automatically configured.