Finisar’s FTCD1333E1PCL FR8 QSFP-DD transceiver modules are designed for use in 400 Gigabit Ethernet links on up to 2km of single mode fiber. They are compliant with the QSFP-DD MSA, QSFP28 MSA, IEEE P802.3bs and portions of IEEE P802.3bm. Digital diagnostic functions are available via the I2C interface, as specified by the MSA and Finisar Application Note AN-20xx.