AsteriskAsterisk is a complete PBX in software. It runs on Linux, BSD and MacOSX and provides all of the features you would expect from a PBX and more. Asterisk does voice over IP in many protocols, and can interoperate ...

OnDO PBX is a software-based telephony system. It is SIP compliant and web-based for easy installation and management. Our PBX includes all the features of traditional PBX systems, such as; call transfer, call conference ...

Trixbox enables even the novice user to quickly set up a voice over IP phone system. Trixbox can be configured to handle a single phone line for a home user, several lines for a small office, or several T1s for a million ...