100G QSFP28 To 4x25G OEO Card designed for multiplexing 4 channels of 25/28G optical signals into 1x100G or demultiplexing 1x100G into 4 channels of 25/28G signals. Operating on the OEO principle, it transparently forwards business data, ideal for long-distance 100G optical transmission or 25G signal multiplexing. Its applications span DWDM Systems and Data Networks, offering multi-service access like Ethernet, OTN, and more. With a single card, it seamlessly handles multiplexing and demultiplexing, ensuring efficient optical signal processing.