Fiber optic reflectometer is the basic measuring device used to determine the quality of the installed elements on the fiber optic line. Undoubtedly, the inseparable connections (fiber optic splices) protected by the fiber optic splice protectors are such elements. In order to be sure that the fiber optic splice protectors produced by our company do not deteriorate the quality of the fiber optic line, we also perform reflectometric measurements in our laboratory. For this purpose, we use the compact measuring platform MTS 6000A V2 High Visibility by VIAVI Solutions. The device enables us to measure at 5 optical wavelengths: 850 and 1300 nm for multi-mode fibers, 1310, 1550 and 1625 nm for single-mode fibers. The tested splice protectors are installed on specially prepared 160 km long fiber optic simulators.