In this reflection, we want to discover the origin of the problems which the users of telephones meet during the transmission and/or the reception of an electronic message. We discovered 9 frequent problems which the users of the telephone face. This is the way after analysis of data, we found diverse originate of these problems among which: the mismanagement of the band passes by the suppliers who record more subscribers than their information superhighway and it is added the system of activations which influence the users to emit at the same moment while the band passes available is low, the geographical situation, the use of an ineffective equipment it leads to the multiplicity of antennas everywhere in the city nevertheless a single effective antenna with a powerful transmitter would be enough, etc. We found that with the implication of the State and of the providers (network suppliers), we can limit the risk and put the users shielded from these problems for an effective communication. The telephony being a technology that got established in all the life of the man and it in all the domains, we were interested in these challenges to try to propose a track of solution both to the users, and to the suppliers through the State which is the regulating archetypal organ.

In this reflexion, we want to manage the transmission channels of images (increase, multiply, limit or decrease the access path or transmission), describe possible methods of transmission and access to the image in order to have an idea about the amount of frames to send per second to maximize the information of highway during a projection in a video surveillance; especially when several stations negotiate live image at the same time. We tempted to outline the procedure of optimization of bandwidth. Multicast, multiple streams and video compression are three innovative methods that we have offered to users in order to optimize bandwidth management in the application of video surveillance. With software of video management of his choice, the user can maximize the function of his camera installations, to further profit a reduction of bandwidth requirements.