This article provides a variation of measuring the temperature distribution along a fiber-optic communication line. It is shown that by measuring the temperature it is possible to localize the places of possible cable damage due to freezing of the soil. This decision allows you to make a decision on the need for excavation work without allowing the breakage of optical fibers. Also this solution is useful when operating communication systems that are sensitive to mechanical stresses in an optical fiber (for example, when transmitting vortexes).
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