The article presents the results of the study of the influence of monitoring and diagnostic means on the values of reliability and functional safety indicators of fault-tolerant information transmission systems. The study was carried out by modeling several variants of a fault-tolerant information transmission system. As a modeling method, an improved state transition diagram with automated construction of a graph of states and transitions is used. On the basis of the obtained results, recommendations for the selection of reliability indicators of control and diagnostic means are formulated to ensure a minimum reduction in the reliability of a fault-tolerant information transmission system.
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