10GBASE Dense Wavelength-Division Multiplexing SFP+ Modules it is designed for carriers and large enterprises with a scalable, flexible, cost-effective system for multiplexing, transporting high-speed data, storage, voice and video applications in point-to-point, add/drop and star network topologies. It operates at a nominal wavelength of 100GHz or 50GHz ITU Grid. Except fixed channel DWDM modules, also have Tunable DWDM SFP+, which can adjust its wavelength on site to the required lambda. Tunable DWDM SFP+ transceivers enable us to change wavelengths unlimited within the C-band DWDM ITU Grid.