The JQ-M31100-LR4C is a Four-Channel, Pluggable, Parallel, Fiber-Optic QSFP28 Transceiver for 100G Receiver Applications. The QSFP28 full-duplex optical module offers4 independent receive channels, each capable of 26Gbps operation for an aggregate data rate of 104Gbps 10km using. This guide provides the definitive roadmap for selecting, deploying, and troubleshooting QSFP28 transceivers while bypassing the painful trial-and-error phase. It explains their technical differences, compatibility considerations, and ideal use cases to help readers choose the right module for enterprise and data center. Quad Small Form-Factor Pluggable Double-Density (QSFP-DD) offers twice as many high-speed electrical interfaces as QSFP28 while maintaining the same port density. When combined with higher transmission rates per electrical interface (28 Gbps to 56 Gbps to 112 Gbps), QSFP-DD optical transceivers can. Smartoptics QSFP-DD transceivers provide cost-efficient 400G and 800G optical networking. As a. QSFP-DD is an advanced hot-pluggable optical transceiver form factor that doubles the bandwidth density of traditional QSFP28 modules by implementing a double-density design with eight electrical lanes instead of four.