The JBX04996 3-meter 400GBASE-CR8 QSFP-DD to 2x QSFP56 Direct Attach Copper Cable represents the ideal solution for organizations requiring high-bandwidth, low-latency connectivity in modern data centers and enterprise networks. This passive breakout DAC cable is specifically engineered to meet the demanding requirements of next-generation 400GB Ethernet networks. **Technical Specifications:** This cable features a robust 28AWG twinax copper construction optimized for signal integrity over its 3-meter length. The QSFP-DD form factor on one end connects to dual QSFP56 ports, enabling efficient bandwidth distribution and flexible network topologies. With full compliance to ETC 400GBASE-CR8 specifications and CMIS (Common Management Interface Specification) standards, it ensures seamless integration with compatible equipment. **Performance & Reliability:** As a passive DAC solution, this cable eliminates the need for power-consuming active elements, reducing operational costs and generating less heat in crowded equipment racks. The copper twinax design provides excellent shielding against electromagnetic interference, ensuring clean signal transmission at 400GB data rates. Operating across a wide temperature range of 0-70°C, it performs reliably in various data center environments. **Compliance & Safety:** Fully compliant with RoHS/ELV directives (EU 2002/95/EC) and certified by TUV and UL, this cable meets the highest safety and environmental standards. These certifications assure IT managers and network administrators that the cable meets rigorous industry requirements for quality and performance. **Cisco Compatibility:** This cable is engineered as a direct replacement for Cisco part number QDD-2Q200-CU3M, providing a cost-effective alternative without sacrificing quality or performance. It's fully compatible with Cisco's 400GB QSFP-DD infrastructure. **Applications:** Ideal for data centers, enterprise networks, high-performance computing clusters, and cloud service providers seeking reliable 400GB connectivity. Perfect for upgrading existing networks to next-generation speeds. **Warranty & Support:** Backed by a 90-day limited warranty and available with custom brand programming options. Ships from US locations (Danville, CA or Beaufort, SC) with free standard shipping on orders exceeding $99, ensuring quick deployment and cost-effective procurement.