10km OTU4/100G Ethernet CFP2 Optical Transceiver Module (CFP2-100G-LR4),F-tone’s CFP2-100G-LR4 100G CFP2 transceiver modules are designed for use in 100 Gigabit Ethernet and 4x28G OTN client interfaces over single mode fiber. They are compliant with the CFP MSA, IEEE 802.3ba 100GBASE-LR4 and OTU4 4I1-9D1F requirements specified in ITU-T Recommendations G.959.1/G.709 and Supplement 39 (G.sup39).