The NOV5600 OTDR is a new generation of portable and intelligent measuring instrument for testing fiber optic communication system. It adopts color touch screen, button/touch operation, internal integration of eight major functional modules, intelligent power-saving management, and 20 hours long standby, which help customers effectively solve the field testing and maintenance.t is mainly used to measure the length, loss and connection quality of optical fibers and cables, and can be widely used in engineering construction, network maintenance and testing, emergency repair, and the development and production of optical fibers and cables. The highest 45dB dynamic range can penetrate optical splitters easily for PON network testing, FTTX.