This paper proposes a collaborative system based on WebRTC technology to improve digital universities eLearning environment. It allows teachers and students, through a web browser, to communicate via chat, audio and camera. It also supports file transfer and screen sharing for computer connected lab equipment. All these features are functional in an IP environment without need for Internet access. For its design and realization, we had to implement a WebRTC signalisation server to manage real-time applications, using the three WebRTC APIs: MediaStream for the acquisition and synchronization of audio and video, Peer Connection for communication between user's browsers and RTCDataChannel for file transfer, Chat and Screen Sharing.

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