The JBX05261 10-meter 40GBASE-CR4 QSFP+ active direct attach copper cable represents the pinnacle of cost-effective, high-speed connectivity for modern data centers. Specifically designed for Arista-compatible networking environments, this cable delivers exceptional performance for demanding applications requiring reliable 40GB Ethernet transmission. **Technical Excellence:** Manufactured to IEEE 802.3ba and SFF-8436 specifications, this active DAC cable features precision-engineered 28AWG twinax copper conductors housed in protective plastic jacketing. The QSFP+ to QSFP+ copper connectors ensure secure, repeatable connections while supporting full 40GBASE-CR4 data rates. Operating across a wide temperature range (0-70°C), the cable maintains performance stability in diverse environmental conditions. **Performance Advantages:** Unlike passive alternatives, the active design provides signal conditioning that extends reliable transmission distances to 10 meters without performance degradation. This makes it particularly valuable for rack-to-rack connections, switch-to-server deployments, and inter-chassis connectivity within data center fabrics. The low-latency copper transmission path ensures deterministic performance for latency-sensitive applications. **Compliance & Reliability:** Fully RoHS compliant and TUV/UL certified, this cable meets stringent environmental and safety standards (EU Directive 2002/95/EC). Each unit includes a 90-day limited warranty, providing confidence in deployment reliability. Custom brand programming is available for organizations requiring proprietary labeling. **Practical Benefits:** Compared to optical transceivers and fiber alternatives, active DAC cables offer superior cost-effectiveness without sacrificing performance. No transceiver modules required—simply connect and deploy. The robust twinax construction withstands typical data center handling while the plastic jacket provides protection against environmental factors. **Logistics & Support:** Shipped from dual locations (Danville, CA and Beaufort, SC) for rapid delivery, with free standard shipping on qualifying orders. This direct-attach solution seamlessly replaces Arista OEM part CAB-Q-Q-10MA, ensuring plug-and-play compatibility with existing infrastructure. Perfect for network administrators managing 40GB deployments who demand reliability without complexity.