How to Choose 100G Optical Modules: Ultimate Guide by QSFP28, LR4, ER4 Type Description: Struggling to choose between 100G SR4, LR4, ER4 optical modules? This guide compares QSFP28 vs CFP, transmission distance, modulation tech, fiber types, and special. How to Choose 100G Optical Modules: Ultimate Guide by QSFP28, LR4, ER4 Type Description: Struggling to choose between 100G SR4, LR4, ER4 optical modules? This guide compares QSFP28 vs CFP, transmission distance, modulation tech, fiber types, and special. How to Choose 100G Optical Modules: Ultimate Guide by QSFP28, LR4, ER4 Type Description: Struggling to choose between 100G SR4, LR4, ER4 optical modules? This guide compares QSFP28 vs CFP, transmission distance, modulation tech, fiber types, and special features for smart selection. In the rapidly. Faced with a variety of models such as SR4/LR4/ER4, how should engineers choose? This article uses 5 major classification dimensions + practical selection solutions to help you overcome the selection difficulties! 1. Packaging Determines Performance Boundaries: 100G QSFP28 VS CFP ▶ QSFP28 -. When you pick a 100G QSFP28 transceiver, think about what your network needs. Check important things like compatibility, how far data must travel, fiber type, connector type, where you will use it, and if it will work in the future. Choosing QSFP28 optical transceivers that fit your system helps. They looked nearly the same, shared the same form factor and 100G data rate, yet ranged in price from $80 to $1,200. Some required MPO-12 fiber, while others used standard LC connectors. But don't worry! By the end of this guide, we'll.