R.V. Klimov - Post-graduate student, Dept. of telecommunications, Ulyanovsk State Technical University. E-mail: chorrus@mail.ru
D.N. Solodovnikova - engineer, OJSC Rostelecom. E-mail: d.solodovnikova@mail.ru

D.A. Tavalinsky1, N.V. Shishkin2, A.V. Yurlov3

1 Military Order of Zhukov University of Radio Electronics (Cherepovets, Russia)
2,3 Russian Federation Security Guard Service Federal Academy (Oryol, Russia)