The JBX05052 400GBASE-CR8 QSFP-DD to 4x QSFP56 Direct Attach Copper (DAC) breakout cable represents a high-performance, cost-effective networking solution for modern data centers and enterprise environments. As a direct compatible replacement for Cisco's QDD-4ZQ100-CU1M part number, this 1-meter cable delivers exceptional value without compromising on quality or performance. Technical Excellence: This passive breakout DAC cable is constructed with premium 30AWG twinax copper conductors, ensuring optimal signal integrity and minimal attenuation across the full 1-meter length. The copper connectors feature QSFP-DD form factor connectivity on one end with quad QSFP56 connectivity on the other, enabling seamless integration with existing 400G infrastructure while supporting breakout to four independent 100G connections. Standards Compliance: Fully qualified to ETC 400GBASE-CR8 specifications and CMIS standards, this cable meets rigorous industry benchmarks. RoHS, TUV, and UL certifications confirm compliance with EU Directive 2002/95/EC and international safety requirements, making it suitable for regulated environments. Reliable Performance: Engineered to operate consistently across 0-70°C temperature ranges, the cable maintains performance stability in diverse data center conditions. The durable plastic jacketing protects against environmental factors while remaining flexible for easy routing and installation. Applications: Ideal for high-speed data center upgrades, this cable supports 400GB connections in switch-to-switch, switch-to-server, and switch-to-storage configurations. It's particularly valuable for organizations migrating to 400G infrastructure while needing flexible breakout options to existing 100G equipment. Customization Available: Custom brand programming options available upon request, allowing integration into white-label or OEM product lines. Unbeatable Value: Ships with free standard shipping on qualifying orders from U.S. distribution centers in Danville, CA and Beaufort, SC, with a 90-day limited warranty included. This cable delivers enterprise-grade performance at wholesale pricing.