400ZR and 400G OpenZR+

The 400ZR is an Optical Interworking Forum (OIF) standard for transporting 400GbE over long distances through fiber optic cables. The standard defines the solution to transport 400GbE optical signals using a single wavelength.

The primary application of 400ZR optics (model numbers QDD-400-ZR and JCO400-QDD-ZR) is to interconnect data centers within a distance of up to 120 km. Data centers require high bandwidth, high speed, and low latency networks. The 400ZR optical module meets these requirements.

400G OpenZR+ (model numbers: QDD-400 ZR-M, JCO400-QDD-ZR-M, and QDD-400G-ZR-M-HP) is an extension of 400ZR specifications to improve performance and adheres to OpenZR+ MSA standard.