The JBX05292 40GBASE-CR4 QSFP+ passive direct attach copper cable represents an essential component for modern high-speed data center and enterprise network infrastructure. This 4-meter twinax cable delivers exceptional performance for Ruckus-compatible network environments, providing a cost-effective solution for short-reach, high-bandwidth connectivity requirements. Technical Excellence: Manufactured with precision 28AWG twinax copper conductors, this passive DAC cable eliminates the power consumption and heat generation associated with active components. The design adheres to IEEE 802.3ba and SFF-8436 standards, ensuring compatibility with QSFP+ equipped switches, routers, and network interface cards. The cable's operating temperature range of 0-70°C accommodates diverse data center environments. Compliance & Reliability: Fully compliant with RoHS Directive 2002/95/EC and certified by TUV and UL, this cable meets stringent safety and environmental standards. The robust plastic jacketing protects copper conductors while maintaining flexibility for installation in congested equipment racks. The 90-day limited warranty provides peace of mind for enterprise deployments. Perfect Use Cases: • Data center rack interconnections • High-speed storage area networks (SANs) • Enterprise switch-to-switch connections • Server-to-network equipment links • Ruckus ICX and FastIron switch environments Advantages Over Alternatives: Unlike optical DAC cables, this passive copper solution requires no power conditioning and offers superior EMI resistance in high-density environments. Compared to active cables, it delivers lower total cost of ownership while maintaining 40GB performance over the 4-meter distance. Installation & Maintenance: The QSFP+ connectors feature positive locking mechanisms for secure, reliable connections. Proper cable management ensures longevity and optimal performance. Direct attachment to compatible QSFP+ ports eliminates transceiver modules, reducing complexity and potential points of failure. Ship from multiple US locations (Danville, CA and Beaufort, SC) ensures rapid delivery with free standard shipping on orders exceeding $99. Custom branding and programming options available for volume purchases and enterprise deployments.