QSFP28-100G-IR4 100Gbps QSFP28 CWDM4 Transceiver, Single Mode, 2km Reach1 Description The QSFP28 transceiver module is designed for use in 100 Gigabit Ethernet links on up to 2km of single mode fiber. It is compliant with the 1000GBASE CWDM4 MSA standard. The module converts 4 inputs channels (ch) of 25Gb s electrical data to 4 CWDM optical signals, and multiplexes them into a single channel for 100Gb s optical transmission. Reversely, on the receiver side, the module optically de multiplexes a 100Gb s input into 4 CWDM