9-in-1 Cable Testing Multifunctionality: Combines 9 key functions including wire mapping, digital cable tracing, port flashing, cable length measurement, PoE checking, crimping test, OPM (optical power meter), VFL (visual fault location), and NCV (non-contact voltage) test . 9-in-1 Cable Testing Multifunctionality: Combines 9 key functions including wire mapping, digital cable tracing, port flashing, cable length measurement, PoE checking, crimping test, OPM (optical power meter), VFL (visual fault location), and NCV (non-contact voltage) test . The NF-859GT comprehensive cable tester combines Wire Detection, Alignment Testing (wire map testing), Cable Length Measurement, PoE Checking, Crimping Testing, Port Blinking, OPM (optical power meter), VFL (visual fault location), NCV (non-contact voltage testing), and Flashlighting into a single. Two scan modes selectable: AC filter /analogue mode, up to 300m. Measure cable (cat5/6) length accurately, the range is 2. Available to 10M/100M/1000M Hub/ switch., LTD is a manufacturer set up in 2006 and based in Shenzhen,China, supplying cable tester, wire tracker, fiber tester, laser distance meter, CCTV tester and other test equipment. After years of development, the company has created a wealth of experience in sales and. An optical power meter is an essential fiber optic test tool, used for measuring absolute transmit / receive power in dBm, cable loss in dB, and for continuity checking / troubleshooting. It is used by technical staff across every industry sector.