The JBX05290 4m QSFP+ Passive Direct Attach Copper Cable represents an enterprise-class networking solution designed for high-speed data center deployments. This 40GBASE-CR4 cable delivers exceptional performance characteristics ideal for organizations requiring reliable, low-latency connectivity between network infrastructure components. **Technical Specifications & Performance:** With a 4-meter length optimized for intermediate switch-to-switch and switch-to-server connections, this cable supports 40GB data transmission rates while maintaining IEEE 802.3ba compliance standards. The 28AWG twinax copper construction provides superior electrical properties, ensuring minimal signal degradation across the cable length. Operating reliably across temperatures from 0°C to 70°C, it maintains consistent performance in various data center environments. **Compatibility & Integration:** Specifically engineered for NVIDIA Mellanox infrastructure, this cable seamlessly integrates with existing deployments. It replaces multiple OEM part numbers including MCP1700-B004E, MC2210128-004, and MC2206128-004, providing cost savings without sacrificing compatibility or performance. QSFP+ to QSFP+ connectivity ensures straightforward installation across compatible equipment. **Quality & Compliance:** RoHS and TUV certified construction guarantees environmental compliance and safety standards adherence. The passive design eliminates power requirements, reducing operational costs while simplifying deployment. Copper connectors resist corrosion and oxidation, ensuring long-term reliability and consistent signal transmission. **Value Proposition:** For IT departments and system integrators, this cable delivers exceptional ROI through durability, reliability, and cost-effectiveness. The 90-day limited warranty provides peace of mind, while free standard shipping on orders exceeding $99 enhances procurement efficiency. Whether replacing aging infrastructure or expanding network capacity, the JBX05290 provides an intelligent solution for modern data center challenges.