Learn the high-speed connection solution using QSFP-DD 400G to QSFP56 2×200G DAC cable between CE98-D8DQ interface card and S900K3 server. SFP-DD's form factor solves technical challenges, achieves dual density interfaces, The innovative electrical interface design supports two channels, each of which can operate under 25 Gbps NRZ modulation or 56 Gbps PAM4 modulation, providing aggregate bandwidth of 56 Gbps NRZ or 112 Gbps PAM4. In modern data centers and enterprise networks, Quad Small Form-factor Pluggable (QSFP) cables are everywhere. They connect servers, switches, and storage at speeds from 40G to 400G and beyond. Thanks to their four-lane parallel architecture, QSFP cables combine high bandwidth with compact design. QSFP-DD (Quad Small Form-Factor Pluggable Double Density) is a next-generation high-speed interface standard for optical communications, widely used in 400G data centers, cloud computing, artificial intelligence (AI), and high-performance computing (HPC) environments. The QSFP-DD 400G to QSFP56. High-speed I/O passive cable assemblies that can deliver data rates as high as 400 Gbps with a variety of lengths or customized options for greater design flexibility.