100GBASE-LR4 and OTN Multirate 10km CFP4 Optical Transceiver FTLC1141SDNL 100G CFP4 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, IEEE 802.3bm CAUI-4, OTU4 4I1-9D1F specified in ITU-T Recommendations G.959.1/G.709 and Supplement 39 (G.sup39) and OIF CEI-28G-VSR. Digital diagnostics functions are available via the MDIO interface, as specified by the CFP MSA and Application Note AN-20xx. The optical transceiver is RoHS compliant as described in Application Note AN-2038.