Basic conformities to law and methods of analysis of potential antijammingness and carrying capacity of communication channels are expounded. Parameters and descriptions of reports, signals and hindrances, their mathematical models, methods of forming and transformation of signals, questions of theory of transmission and encoding of reports are examined. Algorithms over of digital treatment of signals, basic models of channels of электросвязи, principles, are brought multichannel connection and distribution of information. The questions of estimation of efficiency of communication networks and informationtheoretical bases of cryptoprotection of reports are illuminated in the telecommunication systems. For students studying of инфокоммуникационные technologies and communication networks. It can be useful to the specialists in area of connection.