NK81800 Optical Cable Patrol Analyzer is developed by Qingdao NOVKER Communication Technology Co., LTD. It is a comprehensive tester for optical cable routing search and positioning, optical cable loss measurement and fault point measurement. Internal integration of high-precision OTDR, high-sensitivity distributed fiber optic cable vibration detection and accurate fiber optical cable identification three functions, through the mobile phone APP wireless remote control, can quickly realize the link performance test, fiber optic cable vibration location. It can be used for single-mode cable routing verification, on-line monitoring and fault location.