| Nowadays, voice and video over IP occupy a privileged place in the telecommunication world. The uncontested advantage of this technology is its capabilities to mix voice, video and data using the same existing internet infrastructure. Another advantage is the cost of the long-distance communications which has decreased considerably, and let us suppose that this technology has a great future. Many standards and communications protocols have been developed to support such technology. Among them there are signaling protocols like SIP and H.323, and real-time protocols like RTP and RTCP that we have studied and compared in this work.; We propose an object oriented solution that models the SIP protocol. Based on a client-server architecture, we have also succeeded in implementing the SIP protocol, by using the Java Media Framework in order to transmit and receive voice and video on the Internet. |
