Cisco QSFP-DD-400G-DR4-S Transceiver Module

The Cisco QSFP-DD-400G-DR4-S is a pluggable coherent transceiver module designed for high-density 400 Gigabit Ethernet interconnect applications requiring extended reach over single-mode fiber. Implemented in the QSFP-DD (Quad Small Form Factor Pluggable Double Density) form factor, it enables compact, power-efficient deployment of 400GbE fabric infrastructure while maintaining backward compatibility with existing QSFP-DD port infrastructure. The DR4 variant supports Dual-Polarization Quadrature Phase-Shift Keying (DP-QPSK) modulation with advanced forward error correction, delivering reliable coherent transmission across metropolitan and campus distances without requiring optical amplification.

Ideal for

• Inter-datacenter connectivity for distributed AI model training clusters requiring sub-100μs latency across metropolitan distances
• High-frequency trading infrastructure fabric expansion supporting 400GbE switching uplinks with deterministic jitter characteristics
• Large-language model inference cluster interconnect providing non-blocking backplane capacity for multi-GPU training at financial institutions
• Campus backbone upgrades connecting research computing facilities to storage arrays over distances up to 2 km without intermediate amplification
• Cloud provider's 400GbE leaf-spine fabric expansion for elastic workload distribution across availability zones within single city networks
• Telecommunications infrastructure supporting emerging 5G network slicing and edge computing backhaul requiring coherent 400GbE termination

Technical specifications

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