Ip Network Visualization Telephone Dispatch System Design And Development

Dispatching telephone System is a special communication system in the act of commanding and dispatching in commercial manufactures and social activities. Comparing with the common communication system, the Dispatching telephone System pay more attention to the security of calling and the multiformity of calling mode. The development of communication system goes though a long process that is from simulation to digital, from carrier wave transmission to digital optical fibres transmission and from manpower exchange to circuit exchange. Though the huge change, the communication system was greatly improved in scale and quality. The communication system has a lot of development direction in which "Visual Dispatching telephone System over IP" is a great valuable. It will enlarge the meaning and function of the communication system.First, this thesis provide a model about "Visual Dispatching telephone System over IP". Second, we make a systemic analysis and design in that basic. Then aiming at audio data G.723.1 compressed arithmetic, video data MPEG4 compressed arithmetic, multimedia network transport protocols RTP/RTCP and multimedia interlocution protocol SIP that used in the system, we give a special research and material development. Finally, this thesis provide the interface and appraise about the system.