Coarse Wavelength Division Multiplexers(Mini CWDM, MCWDM), are integrated optical modules using Flyin’s proprietary optical bench platform  which can significantly improve optical performance, while also reduce manufacturing costs. Compare to the common standard CWDM module, Flyin's Mini CWDM takes much smaller package size. Much space can be saved in the application and meanwhile the performance and parameters are much better. All Flyin's CWDM modules are Telcordia qualified.(Meet TELCORDIA GR-1221-CORE)