... widely applied in the manufacture, construction and maintenance in optical fiber communication system.Compared with palm OTDR AV6416, ... Group, Spanish, Uruguay.We have 25 years experience of researching&developing optical communication measuring instrument, we are familiar with high quality ... unit, such as 850, 1300, 1310, 1383, 1490, 1550, 1625 and 1650nm wavelengths, with which EG6818 can be used ...