Finisar's QSFP+ Transceiver Module is designed for use in 40 Gigabit Ethernet links over single mode fiber. It is compliant with the QSFP+ MSA and IEEE 802.3ba 40GBASE-LR4. Digital diagnostics functions are available via an I2C interface, as specified by the QSFP+ MSA.
Finisar 10Gbps 10GBase-LR X2 1310nm Transmitter Wavelength Digital Diagnostics Function (DDM) SC Connector Multi-mode Fiber up to 220 meter each Transceiver Module