The JBX05429 40GBASE-CR4 QSFP+ Passive Direct Attach Copper Cable represents a premium solution for data center professionals requiring high-speed network connectivity without the complexity of active electronics. This 2-meter cable delivers exceptional value for organizations deploying Arista network infrastructure. **Technical Excellence:** Built with 30AWG twinax copper conductors and professional-grade plastic jacketing, this passive DAC cable achieves full 40Gbps performance with minimal signal degradation. The dual QSFP+ connectors provide secure, reliable connections for data center switching equipment. Qualified to IEEE 802.3ba and SFF-8436 standards, it meets the stringent requirements of modern networking environments. **Compatibility & Integration:** Specifically engineered for Arista systems, this cable directly replaces OEM part number CAB-Q-Q-2M, ensuring seamless integration into existing infrastructure. The passive design eliminates power requirements and reduces heat generation compared to active alternatives, making it ideal for densely-packed switching environments. **Quality & Compliance:** Fully RoHS and ELV compliant with TUV and UL safety certifications, this cable meets international environmental and safety standards. The robust construction supports operating temperatures from 0-70°C, accommodating both standard and demanding deployment scenarios. **Value Proposition:** Passive DAC technology offers significant cost advantages over active solutions while delivering comparable performance for shorter distances. The 2-meter length is ideal for top-of-rack switching scenarios common in modern data centers. Free standard shipping on orders exceeding $99 and a 90-day limited warranty provide additional peace of mind. Ships from convenient US locations (Danville, CA and Beaufort, SC) for faster delivery.