QDD-400G-ZR-S — QSFP-DD 400 Gbps

The QDD-400G-ZR-S is a Cisco QSFP-DD 400 Gbps transceiver compliant with the OIF ZR standard, designed for coherent links over duplex single-mode fiber up to 40 km via an LC (UPC) connector. This latest-generation module integrates coherent modulation directly in the pluggable form factor, eliminating the need for an external transponder, and operates within a range of +15 to +70 °C.

It is aimed at operators and hyperscalers deploying 400 Gbps data center interconnects over metropolitan distances. OIF ZR compliance ensures interoperability with multi-vendor equipment, simplifying open-line-system deployments. Genuine Cisco hardware, manufacturer warranty.