The JBX04984 2m 400GBASE-CR8 QSFP-DD to 2x QSFP56 direct attach copper breakout cable represents the latest generation of high-speed networking connectivity solutions for modern data centers. As a drop-in replacement for the Arista CAB-D-2Q-400G-2M, this cable delivers exceptional value and performance for organizations requiring 400GB network infrastructure. Technical Specifications & Performance: This passive direct attach copper (DAC) cable features 26AWG twinax construction, providing optimal impedance matching and signal integrity for 400GBASE-CR8 applications. Qualified to ETC 400GBASE-CR8 and QSFP-DD MSA specifications, it supports full 400GB/s data rates with minimal latency—a critical advantage over optical alternatives in latency-sensitive environments. The 2-meter length accommodates typical rack-to-rack distances in standard data center layouts. Construction & Durability: Manufactured with high-quality copper conductors and plastic jacketing, this cable meets RoHS and ELV directives, ensuring environmental compliance and longevity. Copper connectors on both QSFP-DD and QSFP56 ends resist corrosion while maintaining reliable connections. The passive design eliminates power consumption, reducing operational costs and heat generation in dense network deployments. Compatibility & Integration: Designed specifically for Arista networking ecosystems, this breakout cable seamlessly integrates with existing infrastructure. The single QSFP-DD input splits into dual QSFP56 outputs, enabling flexible port configuration and improved network scalability without requiring additional equipment or complex installations. Cost-Effective Alternative: Unlike active optical cables requiring power and transceivers, this passive DAC solution delivers exceptional value while maintaining superior performance. Ideal for short-distance data center links, it reduces total cost of ownership while maintaining the reliability enterprises demand. Compliance & Warranty: Safety certified by TUV and UL, with full RoHS compliance. Backed by a 90-day limited warranty. Ships from multiple U.S. locations with free standard shipping on orders exceeding $99, ensuring quick deployment and minimal downtime for network upgrades. Applications: Perfect for hyperscale data centers, enterprise switching infrastructure, server interconnects, and storage network backends requiring reliable, cost-effective 400GB connectivity.