?Widely Application? It's fully compliant QSFP+ MSA SFF-8665, SFF-8636, IEEE 802.3ba, IEEE 802.3bm, 100G CWDM4 MSA, and ITU-T G.694.2 standards, widely used on 100GBASE-CWDM4 100G Ethernet links, data center interconnect, high-performance enterprise computing networks, Infiniband QDR and DDR interconnects, interprise core and distribution layer applications for providing larger transmission capacity and saving optical fiber resources. ?Transmission?QSFP28 Optical Transceiver Module is designed for use in 100GBASE Ethernet throughput up to 2km over single mode fiber (SMF) with duplex LC connectors. The 100 Gigabit Ethernet signal is carried over four wavelengths at 1271, 1291, 1311, 1331 nm. The wavalength is 1310nm but still support 1311nm. ?Connector&Cable?100GBASE-CWDM4 QSFP provides 100GBase-CWDM4 throughput up to 2km over single-mode fiber (SMF) using a duplex LC/UPC connector. 100G CWDM4 module can be connected to 1310 special port of CWDM MUX for signal transmission, CWDM4 QSFP uses 4 different CWDM channels at 1271, 1291, 1311, and 1331nm. ?100GBASE-CWDM4?100GBASE-CWDM4 QSFP28 Optical Transceiver Module (SMF, 1271nm, 1291nm, 1311nm and 1331nm, 2km, LC, DOM), hot Pluggable LC duplex connector, easy to install, hot swappable transceive, Max. 3.5W Power Consumption, I2C interface with integrated DDM and Host FEC, Single +3.3V power supply. support real-time configuration. ?Wide Compatibility?It's fully compliant for Cisco networks theQSFP28 MSA, SFF-8665, SFF-8636, IEEE 802.3ba, IEEE 802.3bm, 100G CWDM4 MSA, and ITU-T G.694.2 standards, compatible for Cisco QSFP-100G-CWDM4-S and QSFP-100G-SM-SR.