400G CFP2 DCO DWDM Transceiver Module Long Distance Transmission Optical Transceiver This high-performance optical transceiver module features CFP2-DCO form factor with golden-finger electrical interface for compatible CFP2 switch cages. Equipped with Duplex LC fiber connectors for standard single-mode fiber patch cords, it incorporates Digital Coherent Optics (DCO) architecture with C-band tunable ITLA laser for DWDM dense-wavelength systems and long-distance transmission