The QDD-200G-SR8 Transceiver is designed to transmit and receive serial optical data links up to 28 Gb/s data rate(per channel) over multi-mode fiber. It is a small-form- factor hot pluggable transceiver module integrated with the high performance VCSEL laser and high sensitivity PIN receiver. It. modulation format via up to 2km single mode fiber. Recommended Operating Conditions IV. The product range includes QSFP56 modules such as FR4, FR1, LR4, and ER4, supporting applications with speeds of. Ethernet, Data centers, Data center internal networks, enterprise, Campus networks, Metropolitan networks, 5G wireless networks and other telecommunication environments. Find out what's included and explore available upgrade options from Keysight.