The CWDM is a passive MUX/DEMUX unit, which allows you to combine up to 8 fibre links into 1, to simplify and reduce the cost of long distance fibre installations. The Coarse Wavelength-Division Multiplexing (CWDM) technology offers a solution which will increase the capacity of existing fibre infrastructure by enabling multiple channels/wavelengths over the same fibre cabling. CWDM in your network will allow you to: Increase efficiency of existing fibre network Provide scalable and easy-to-deploy fibre channel services Reduce electricity consumption Reduce equipment maintenance and installation costs