Effeciency like any normal conferences, Video Conference becomes more and more convenient and makes many country interested to join. Together with the development of network as well as  mobile and internet. In Viet Nam, this kind of services has been known  since  1995, but up to now  it hasn't  been applied in the life

IP Multicast Television Conference System is one of the best products of scientific research and technology regarded as the level of Government : " The research is implemented as the overall process , the solutions are secured reliably , the information secret together with applications having been applied for Video-Conference”, followed the code of KC.01.18 undertaken by Vice  Professor - Doctor Tran Hong Quan ( The Academy of Scientifically Technological Post Office )