The 100GBASE-DR Single Lambda QSFP28 Optical Transceiver Module is designed for use in 100GBASE Ethernet throughput up to 500m over single mode fiber (SMF) using a wavelength of 1310nm via duplex LC connectors. The transceiver includes a gearbox chip to convert the 4x25G NRZ electrical signals to a 1x100G PAM-4 optical signal. This transceiver is compliant with QSFP28 MSA, IEEE 802.3cd and 100G Lambda MSA standard. Digital diagnostics functions are also available via the I2C interface, as specified by the QSFP28 MSA, to allow access to real-time operating parameters. With these features, this easy to install, hot swappable transceiver is suitable to be used in various applications, such as Data Center, 100G Ethernet, 400G to 100G breakout applications.