Ferrofish SFP MM MADI Multimode ModulePlease note, that the SINGLEMODE and MULTIMODE standards are not compatible, especially the cables differ. Please also only use modules from FERROFISH, since modules from other manufacturers may not work correctly, and are excluded from warranty. Before you buy, ensure, that the standard the unit on the other side uses is identical. delivery: SFP module MULTIMODE LC SC Cable Unlock code (You tell us the Serial number and you get the Unlock code.)