QSFP28-100G-LR4-20 100Gbps QSFP28 LR4 Transceiver, Single Mode, 20km Reach1 Description The QSFP28 100G LR4 20 is a transceiver module designed for 20km optical communication applications. The design is compliant to 100GbASE LR4 of the IEEE 802. 3 2012 Clause 88 standard IEEE 802. 3bm CAUI 4 chip to module electrical standard ITU T G. 959. 1 2012 02 standard . The module converts 4 inputs channels (ch) of 25. 78 Gbps to 27. 95Gbps electrical data to 4 lanes optical signals, and multiplexes them into a single channel for