The Cisco QSFP-40G-CSR-S Compatible 40GBASE-SWDM4 QSFP+ transceiver modules are designed for use in 40 Gigabit Ethernet links over duplex multimode fiber (MMF). They are compliant with the QSFP+ MSA and IEEE 802.3ba XLPPI electrical interface. Digital diagnostics functions are available via an I2C interface, as specified by the QSFP+ MSA, to allow access to real-time operating parameters.
The optical transceiver is RoHS compliant as described in Application Note AN-2038. With these features, this easy to install, hot swappable transceiver is suitable to be used in various applications, such as 40G Ethernet and Enterprise Data Center.