This training course in Data Transmission Systems provides a comprehensive overview of how data is transmitted via communication networks and transmission systems. It begins by exploring the communication networks, ranging from general principles to the development of circuit-switched networks and the telephone network. Fundamental concepts relating to signals are introduced, and the the difference between analogue and digital transmission, as well as the units used in transmission. You will cover the transmission techniques, including analogue modulation, frequency-division multiplexing (FDM), pulse-code modulation (PCM) and time-division multiplexing (TDM). Line equipment and line-sharing equipment used in data transmission are examined.