The 400G QSFP-DD DR4 Optical Transceiver is designed for high-bandwidth data center networking, including leaf-spine architectures, switch-to-switch links and cloud infrastructure upgrades. It supports 400G Ethernet transmission over single-mode fiber with an MPO interface and is suitable for short-to-medium reach data center interconnect applications. With support for 400G connectivity and 4x100G breakout deployment scenarios, the module helps data center operators migrate from 100G to 400G while maintaining flexible network expansion.