SFP include SR LR ER ZR,CWDM/DWDM,BIDI series,100M SFP for Fast Ethernet application, 1.25G SFP for Gigabit Ethernet application, SDH/SONET SFP for STM-1/ 4/ 16 or OC-3/ 12/ 48, Fiber Channel for FC/ FC2/ FC4 .complaint withMSA,SFF-8472,suitable for DC,Metro and Transmission networks.