Description: The dynamic model of the protected informatively-telecommunication system is analysed. The characteristic features of its functioning are exposed. The design of the special function of estimation of protected of the informatively-telecommunication system is conducted. The unidimensional phase portraits of informative traffic of different telecommunication services are formed. Researches of dependence of the special function (quasi-potential) are conducted from the values of intensity of input stream of information. Dignities and lacks of the modelled special function are exposed.
Keywords: protected of the informatively-telecommunication system, exponential stability, quasi-potential, Lyapunov function