Computer technologies are the main part of modern high-speed telecommunication systems. Modern telecommunications systems are increasingly dependent on computers for data transmission, reception, and processing. Thus, it has become important for various specialists in the telecommunications industry to receive training and education in the basics of various computer technologies. In the study course we integrate the in-depth study of computer systems with the latest technologies in both modelling and practical operation. Students gain knowledge and improve skills by studying computer models and real high-speed data communication systems. Students learn data preparation, transmission, retrieval, and data processing techniques including secure data transmission policies in telecommunications systems.