PDF of this tutorialNetwork bandwidth is expected to increase by a factor of 10 each year over the next several years. Dense wavelength division multiplexing (DWDM) is becoming the dominant choice of transport for all fiber. Even though DWDM equipment today carries only a few wavelengths, 40 to 100 wavelengths carried on one single fiber will be possible in the near future.
An integrating technology like DTM, having been developed for exactly this situation, is then needed for operators to be able to supply real-time video to the end user in an efficient way. As the bottlenecks of networks move from the transfer capacity of the network links to the processing capacity of the network nodes, DTM aims to reduce network complexity to provide full access to available bandwidth.
A community generates a great amount of information, but the information does not become true information until it is copied and provided to a receiver. The most efficient and easiest way to gain knowledge is through images. As we all know, children manage to attain a tremendous amount of knowledge by watching and listening. The use of real-time video and audio for transferring knowledge is almost always more efficient than the use of textbooks. In schools and at home, children are already starting to use interactive video over computer networks as a key tool for learning.
