The OCC-4056C is the most complete DWDM optical channel checker (OCC) on the market. The OCC-4056C module for the T-BERD/MTS-2000, -4000 V2 and -5800 and OneAdvisor 800 platforms offers OSA like functionality and speed in a handheld form factor, perfect for successfully deploying and maintaining wavelength routes for Fiber Deep, Remote PHY, C-RAN and 5G applications. It is an ideal test tool for service providers to install, maintain and upgrade metro/access links and DWDM systems. It measures wavelengths and power levels of DWDM channels and displays the complete spectrum.