The 400G-FR4-QSFPDD2KM from Extreme Networks is a full-featured 400 Gigabit Ethernet transceiver designed for long-range single-mode fiber (SMF) links up to 2 kilometers. Built with QSFP-DD form factor and using four 100G PAM4 optical lanes over CWDM4 wavelengths, this FR4 module delivers reliable, high-performance connectivity for hyperscale, cloud, and service provider networks.
Its efficient wavelength multiplexing minimizes fiber usage while maintaining compatibility with 100G breakout configurations, making it ideal for core aggregation and data center interconnects. Fully compliant with IEEE 802.3cu standards, the module ensures excellent interoperability with other 400G FR4 optics.
The hot-swappable design enables rapid deployment and replacement, reducing operational downtime. With digital diagnostics monitoring (DDM), administrators can proactively monitor performance metrics such as optical power, temperature, and voltage. The transceiver?s low power draw and compact footprint support energy-efficient scale-out architectures in growing network infrastructures.
Whether used in AI/ML workloads or enterprise core links, the 400G-FR4 offers secure, long-range performance with high reliability and flexibility.