Domestic fiber-optic component base designed for harsh operating conditions is considered. The main technical characteristics are given, as well as methods for measuring them, optical fibers, fiber-optic cables, optical connectors, couplers, splitters, switches, passive and active fiber-optic delay lines, discrete transmitting and receiving optoelectronic modules, optical transceivers and repeaters. Disclosed are methods of monitoring reliability parameters of fibre-optic components taking into account their fundamental differences from electronic components.