Coarse Wavelength Vaevaega Multiplexing (CWDM) o le faʻaaogaina o le Fiber Optical Multiplexer i eseese wavelengths o malamalama moli faʻateleina i le tasi tasi alava opitika mo le lafoina, i le mauaina o le iʻuga o le soʻotaga, ma le Fiber Optical Multiplexer fiber fefiloi faʻatasia ua vavaeina i eseese faʻailoga eletise, fesoʻotaʻi atu i le masini maua mo tagata.
O le 100GHz CWDM Mux / Demux Module i luga o le tasi poʻo le duplex single mode fiber e masani lava ona faʻalautele lau lautele bandwidth. E ofoina maualuga tu ma faʻatuatuaina, ma ei ai tamaʻi pusa afifi. O le gaioiga o lona wavelength e mai 1270nm i 1610nm (1261nm-1611nm) lea e ofoina atoa 18 auala ma 20nm auala vaʻaia.