Product overview The 400G QSFP-DD module (400GBASE Quad Small Form-Factor Pluggable Double Density) is a new generation of 400G transceiver module based on the QSFP-DD form factor. It is a high-density, high-speed pluggable module with an additional row of contacts. It can provide eight channels of electrical interfaces, and the QSFP-DD module series provide the industry's highest bandwidth density. Features and benefits of 400G QSFP-DD Modules 1. Support hot swap Input/output devices plugged into 400G Ethernet Cisco QSFP ports 2. Interoperability Interoperable with other IEEE standard 400GBASE interfaces when applicable 3. Cisco platform certification Qualified and tested on QSFP-DD 400G port and obtained Cisco platform certification 4. Comply with IEEE 802.3bs It is compliant to IEEE 802.3bs protocol and 400GAUI-8/CEI-56G-VSR-PAM4 standard. 5. Comply with QSFP-DD MSA standard The collaboration of MSA will make the implementation and operation of the QSFP-DD pluggable interface in network equipment faster 6. Ultrahigh speed PAM4 modulation that supports speeds up to 400G runs at a speed of 50 Gbps. 7. Backward compatibility Backward compatible with low-speed QSFP (QSFP+ and QSFP28) pluggable modules and cables, designed for high-speed optical network applications. Application and market of 400G QSFP DD Guanglianâ??s 400G QSFP-DD product portfolio provides customers with a variety of ultra-high-density transceiver modules and the flexibility of 400 Gigabit Ethernet connection options. 400G is one of the highest data rates in the Ethernet world, providing critical aggregation and high bandwidth Interconnect applications provide improved functions. Therefore, 400G QSFP-DD is currently the most widely used fiber optic transceiversmodules in this series. The main applications are 400G Ethernet, ultra-large-scale data centers, high-performance computing networks, cloud networks, enterprise core and Distribution layer, Internet exchange, managed services, wireless infrastructure core, service provider and operator core network, and video distribution infrastructure. Technical advantages of 400G QSFP DD As a professional fiber optic transceivers manufacturer and supplier, Guanglian provides a comprehensive 400G QSFP-DD optical transceiver product portfolio. Our compatible QSFP-DD product portfolio includes transceivers that can operate on single-mode or multi-mode optical fibers. A connection distance of a few meters to 40 kilometers, and can support data rates up to 425 Gbps and 400G Ethernet applications.