CWDM Mux Demux CWDM Mux Demux CCWDM Mux Demux 18 Channels 1270-1610nm, with Monitor Port, LC/UPC, Dual Fiber CWDM Mux Demux, 1 8 Channels 1470-1610nm, with Monitor and Expansion Port, LC/UPC, Dual Fiber, Low 8 Channels 1270-1450nm (Skip 1390, 1410nm), with Monitor and Expansion Port, LC/ 8 Channels 1470-1610nm, with Monitor and Expansion Port, LC/UPC, Dual Fiber, Hig 18 Channels 1270-1610nm, with Monitor Port, 2.5dB IL, LC/UPC, Dual Fiber, CWDM M 4 Channels 1270-1330nm, LC/UPC, Dual Fiber, Low Insertion Loss CWDM Mux Demux, F 9 Channels 1270-1590nm, LC/UPC, Single Fiber, Low Insertion Loss CWDM Mux Demux, FMU 2-Slot 1U 19” Rack Chassis Unloaded, holds up to 2 Units FMU Plug-in Module