Cisco QSFP-400G-FR4 400GBase-FR4 2km SMF Transceiver

The Cisco QSFP-400G-FR4 is a 400 Gigabit Ethernet transceiver module designed for intra-datacenter and campus-core connectivity over single-mode fiber. Operating at 400G line rate across four parallel 100G wavelengths, it delivers ultra-high-density interconnect capability for modern spine-and-leaf fabric architectures with a maximum reach of 2 kilometers on standard ITU-T G.652.D single-mode fiber.

This transceiver employs parallel single-mode fiber (PSM) technology with four independent optical channels, each optimized for short-to-medium distance transmission. The FR4 variant is specifically engineered for intra-campus and inter-row datacenter deployments where 2km reach satisfies topology requirements while maintaining cost-effectiveness relative to longer-distance options.

The module integrates digital diagnostics monitoring (DDM) capabilities for real-time operational telemetry and integrates seamlessly into Cisco NCS 5500, ASR 9000, and select Nexus 9000 platforms. It addresses the 2025-2026 adoption wave of 400G spine fabrics in higher-education and healthcare networks transitioning from 100G/200G infrastructure.

Ideal for

• Hospital network spine fabric refresh: Core leaf-to-spine and spine-to-core interconnects in multi-building campuses requiring 2km inter-building links
• University datacenter 400G upgrade: Research computing cluster aggregation and inter-pod spine connectivity for 2025-2026 infrastructure modernization
• Enterprise campus-core consolidation: High-capacity backbone links between building distribution layers and central datacenter facilities
• Service provider metro aggregation: Regional hub connectivity and inter-POP links within metropolitan service delivery networks
• Financial services trading floor: Ultra-low-latency data distribution to multiple trading zones within large office campuses
• Large-scale HPC cluster interconnect: Parallel compute node aggregation and inter-cluster spine connections supporting AI/ML workload scaling

Technical specifications

Available from Omnixon Global. Submit an RFQ and our team will confirm configuration and availability for your order.