Oabona Pikati

learned a lot from VOIP school , and it is practical, and made me aware of pen testing skills

Muhammad Faheem
Great courses, it helped to me gain SIP knowledge and implementation of OpenSIP based SBC
Guilhermo Prado
As a Flavio's follower since OpenSer, I've been always in touch with what topics are relevant, for my is important now WebRTC and how SIP and WEBRTC can work together