Professional Online OTDR viewer and analysis software for fiber optic testers. SOR trace files, generate PDF reports, and train with virtual OTDR simulator. OTDR testing analyzes fiber optic cable performance from end to end by testing components along the cable, including connection points, bends, and splices. Download free OTDR Trainer Software for PCs After you study this page, you can download a free OTDR Trainer to run on your PC. The OTDR. For detailed troubleshooting or identifying faults, an OTDR (Optical Time Domain Reflectometer) is a better fit. It is the optical equivalent of an electronic time domain reflectometer. ---- ----iOLM is an EXFO OTDR-based application designed to simplify OTDR testing by eliminating the need to analyze and interpret multiple complex OTDR traces. Its advanced algorithms dynamically define the testing parameters, as well as the number of acquisitions that best fit the network under test. Fiber optic testing of a newly installed system not only verifies that the system meets its design requirements, but also creates a performance baseline for all future testing and troubleshooting of t at system. Corning recommends that all fiber optic systems be tested to a minimum set.