voopIX: Building free VoIP infrastructure for academic, science and educational institutions in Croatia entirely based on Open Source software

One of many services that CARNet has in its network is called voopIX, which main goal is to provide free telephony service between CARNet member institutions by using Voice over IP standardized protocols and open source solutions. The main goal of this project is to interconnect existing legacy PBXes on institution premises by using VoIP gateways to transform traditional telephony standards (for example ISDN PRI connections) to VoIP. VoopIX project is entirely built and maintained by CARNets employees. At this time our reports show that, even in this early stage, we can terminate around 4% of all calls from institutions that are now using our system. We predict that this will grow to 10–15% of all calls and that will cut costs for about 2.000.000 EUR yearly in Croatia.