The JBX05408 2.5m 40GBASE-CR4 QSFP+ Passive Direct Attach Copper Cable represents a cost-effective, high-performance solution for modern data center networking. This professional-grade cable is engineered to meet the demanding requirements of Arista-based network architectures while delivering exceptional reliability and performance. Technical Specifications: This passive DAC cable features QSFP+ connectors on both ends, supporting the 40GBASE-CR4 standard for 40 gigabit ethernet transmission. The 30AWG twinax copper construction provides superior signal integrity over the 2.5-meter distance, making it ideal for rack-to-rack or switch-to-switch connections within data center environments. The cable maintains compliance with IEEE 802.3ba specifications and operates reliably across temperatures from 0 to 70°C. Advantages of Passive DAC Technology: Unlike active cables or transceiver-based solutions, passive DAC cables offer lower power consumption, reduced latency, and minimal heat generation. The JBX05408's passive design eliminates the complexity and expense of active components, making it an economical choice for high-density deployments without sacrificing performance. Compliance and Quality: The cable meets RoHS (Restriction of Hazardous Substances) and ELV (Electrical and Electronic Equipment) directives, ensuring environmental compliance and safety. It carries UL and TÜV certifications, validating its quality and reliability standards. The 90-day limited warranty provides peace of mind for enterprise deployments. Arista Compatibility: Specifically designed as a direct replacement for Arista's CAB-Q-Q-2.5M, this cable integrates seamlessly with Arista 7050 series, 7060 series, and other compatible switches and networking equipment. The validated compatibility ensures plug-and-play installation without additional configuration. Applications and Use Cases: Ideal for data center interconnects, storage area networks, and high-performance computing clusters. The 2.5-meter length accommodates standard rack spacing and provides flexibility in equipment placement. Suitable for organizations requiring reliable, cost-effective connectivity solutions in virtualized environments and cloud infrastructure deployments. Shipping and Support: Ship from multiple U.S. locations (Danville, CA and Beaufort, SC) ensures fast delivery. Orders exceeding $99 qualify for free standard shipping. Custom brand programming is available for organizations requiring OEM compatibility or specific labeling requirements.