The SONT 400G QSFP112 FR4(Q27C4-F02C) optical transceiver is a 4 channel electrical, 4 channel optical, pluggable, single mode fiber, QSFP112 transceiver for 400 Gigabit Ethernet applications. Each electrical data lanes or optical lanes support 106.25Gbps, and multiplex them into one single mode fiber for 425Gb/s optical transmission. It allows communication up to 2km over a duplex LC connector single mode optical fiber cable. These modules are designed to operate over single mode fiber systems using CWDM nominal wavelengths of 1271nm, 1291nm, 1311nm and 1331nm. The optical interface uses a conventional duplex LC SMF connector. This high performance transceiver module is intended for medium-range SMF data communication and interconnect applications.