FTLC9555QEPM FTLC9555QEPM 100G QSFP28 transceiver modules are designed for use in 40/100 Gigabit Ethernet links over multimode fiber. They are compliant with the QSFP28 MSA, IEEE 802.3bm 100GBASE-SR4 and IEEE 802.3bm CAUI-4. Digital diagnostic functions are available via the I2C interface, as specified by the QSFP28 MSA and Application Note AN-2141. The optical transceiver is RoHS compliant as described in Application Note AN-2038.