The QSFP+ transceiver modules are designed for use in 40 Gigabit per second links over parallel multimode fiber, including breakout to four 10 Gigabit per second links. They are compliant with the QSFP+ MSA and IEEE 802.3ba, 40GBASE-SR4 and IEEE 802.3ba 10GBASE-SR. Digital diagnostics functions are available via an I2C interface, as specified by the QSFP+ MSA.