Analysis of functional safety of electronic communication system equipment

Today, the equipment of electronic communication networks (EECN) consists two interconnected components. The first is hardware, second software, normal functioning each which depends on network in general. One main concepts characterizing network's ability to perform tasks as intended functional safety (FS). This concept similar reliability, but differs mainly that context all possible failure situations are considered, and when considering FS, only those lead certain system functioning. Failures divided into four categories: detected safe dangerous, undetected dangerous. From point view dangerous ones considered constitute threats. According number failures, there levels security completeness. article also considers international standards, provide definitions quantitative characteristics parameters FS. So, FS include availability ratio, average time failure, probability a failure. At same time, mathematical apparatus reliability theory can be applied analysis hardware component EECN quite widely researched, software needs further study. Also, affected by factors, both external internal. task formation methods measures aimed at eliminating or reducing impact influencing factors. since various types used EECN, it necessary focus research it.