An Optical Fiber Identifier is a crucial tool for optical maintenance. used in nondestructive fiber identification projects. It also features a Visual Fault Locator module with fault location and power meter functions. Utilizing macro bending technology for nondestructive testing online. it can measure signal direction and power. preventing misoperations that could interrupt lines. Macro bending measurement involves using fiber-optic bending to allow weak optical signals to leak out. enabling the detection of signal direction and intensity without damaging the optical fiber. disrupting communications. or directly detecting 2.5mm bare fiber. as well as 0.9mm and 2.5mm fiber casing tight jumpers.