Quad Small Form-factor

QDD-400G-LR8-S Overview

The Cisco QDD-400G-LR8-S is a cutting-edge 400GBase-LR8 QSFP-DD transceiver built for ultra-high-speed, long-range optical connectivity. Designed to transmit eight parallel 50Gbps channels using PAM4 modulation over single-mode fiber, it delivers an aggregate throughput of 400Gbps at distances up to 10 kilometers. Its duplex LC interface ensures compatibility with standard SMF infrastructure, while the QSFP-DD form factor enables high-density port configurations in modern switches and routers. Ideal for data center interconnects, large-scale enterprise backbones, and carrier-grade metro links, this module offers exceptional performance, scalability, and reliability for next-generation networking demands.