The 8ch DWDM MUX DEMUX is designed by FIBERWDM, wavelength from C21 to C28(1560.61nm~1554.94nm),(By the way, we can support customize other waves); in accordance with the ITU-T G.694.1 100GHZ grid, it maximizes the capacity of the C-band range. The 8ch DWDM is totally passive and LGX box module device, it can plug in the 2-slot 1 U rack; the product insertion loss is＜2.4dB. And it conjunct with The DWDM amplifiers and DCM device, the 8ch DWDM transfer system can support a long distance transmission.