Since 2010, Belledonne Communications is specialized in voice and video over IP applications and communication systems. We offer a complete and integrated solution for IP to IP calls, including SIP Client and SIP server. Our company edits, distributes and proposes engineering services around our VoIP softwares : Linphone, an open source SIP video phone working on most popular mobile and desktop platforms, and Flexisip, a SIP proxy server. The areas of expertise of our engineers include Telecom software development, media streaming engine and signal processing, communication and signaling protocols. Our softwares have been developed to be adapted to meet customers’ projects. Thus, Linphone and its components are drivers of innovations in many sectors: telecom systems, home automation, secure communications, health, social networking, etc.