Problem "to deliver a sound signal from point A to point B occurs regularly in the broadcast. From the studio to the transmitter, from concert hall to the studio, and not one time, because besides the main and dripping already and more and reserve. What methods and solutions these tasks can offer us modern technology? Ways to transmit sound from point A to point B a great many, but in each case have to choose two or three options that are available for technical reasons. Somewhere there finished optics, or E1 channel with them and begin development. Somewhere you have to start from scratch, then the choice is wider, but there are other limitations.

What to choose? Choose from affordable, given its properties and opportunities and goals. The simplest and oldest way of direct copper wires for analog transmission of sound is used very widely, and still some stations are already using prolozheiiuyu copper as a reserve. Cons obvious; link reliability is low, and may reduce the parameters of the transmission medium must be less common terminal equipment, sophisticated diagnostic and accidents at the cliffs and vague prospects even in the near future. Tomorrow will seem burdensome to the owner to maintain the copper cable network and will have to look for other opportunities for delivery. The next option in the historical sense of a microwave relay (DMR). In this case, too, is organized by the "direct route, ie one pass point microwave radio links with a point, but in general possible ramifications of the road. Initially, RRL were analog, then gradually switched to digital technology.

As development of their communication networks are used to deliver audio signals. The network can be organized by channel, such as synchronous E1. Physical medium for transmission may act all the same copper, some network segments may be implemented as a microwave radio, the signals can be transmitted via a satellite user of all this might not be aware. E1 channel is digital and can therefore transmit one or more channels of audio in digital form. Of course, there are multiple options for the transfer with various flow rates (bit rate) modes (mono / stereo) and sampling rates that are determined external to the device via the encoder. At the expense of Audio compression can reduce the demands on bandwidth is enough to have 256 kbit / s when working with the MDE, but even at this speed, the price channel is still quite high.