These cables support 400Gbps data rates using 8 lanes of 50G PAM4 modulation, providing robust connectivity for high-density applications. Product description The QDD-400G-03AOC is an active optical direct attach cable with QSFP-DD connectors and has 3m length. Cable provides short distance (same shelf) inexpensive connectivity at 400G rates between two 400G QSFP-DD data ports. This DAC is compliant with IEEE802. 3ck and SFF-8636 MSA standards. It is suitable for cost effective close range interconnections within equipment room. With the rapid growth of AI computing, High-Performance Computing (HPC), and hyperscale cloud data centers, network interconnect technologies are evolving from 100G/200G to 400G and even 800G. In this transition, high bandwidth, ultra-low latency, and energy-efficient connectivity solutions have. The 400G Ethernet DAC is a short-range Ethernet technology based on high-speed copper interconnects for data transmission at 400 Gbps. This technology is used for inter-cabinet. Siemon's 400G High Speed Cable Assemblies are offered in DACs (Direct Attach Copper Cables), ACCs (Active Copper Cables), AEC (Active Electrical Cables), and AOCs (Active Optical Cables).