In the first volume of the three-volume manual, the basic concepts of the theory of signal transmission, primary and secondary telecommunication networks are considered from a single point of view. The focus is on modern areas of development of telecommunication networks and systems: digital transmission methods, digital networks of integrated services, intelligent networks, data networks, telematic services, telecommunication control systems. The second volume deals with radio, radio broadcasting and television systems. The focus is on promising areas for the development of wireless communications: satellite communications, communication with mobile objects. The third volume of the tutorial discusses the construction of multi-service communication networks (MCC). In a compact form, material is presented on access networks, transport networks and control networks. The description of such technologies as Softswitch and MPLS and examples of building networks based on them are given.