The JBX05377 1-meter 40GBASE-CR4 QSFP+ Active Direct Attach Copper Cable represents premium connectivity for modern data centers and enterprise networks. This Cisco-compatible solution is engineered to deliver consistent 40Gbps performance in demanding high-speed applications. **Technical Specifications:** Features industry-standard QSFP+ connectors on both ends with 30AWG twinax copper construction providing optimal signal integrity. The cable measures 1 meter in length with compact dimensions (12x12x2) enabling flexible routing in tight rack environments. Operates reliably across 0-70°C (32-158°F) temperature ranges, supporting extended deployment scenarios. **Compliance & Certifications:** Fully qualified to IEEE 802.3ba and SFF-8436 specifications, ensuring interoperability across leading infrastructure platforms. RoHS, TUV, and UL certifications confirm environmental responsibility and safety standards compliance. Meets EU directive 2002/95/EC requirements for hazardous substance restrictions. **Key Advantages:** Active DAC technology eliminates the need for external transceivers, reducing infrastructure costs while improving deployment efficiency. Direct copper connections ensure superior signal quality compared to passive alternatives. 30AWG gauge provides optimal performance-to-flexibility balance for data center installations. **Applications:** Ideal for server-to-switch connections, storage area network (SAN) implementations, and high-performance computing clusters. Perfect for hyperscale data centers, cloud infrastructure, and enterprise network upgrades requiring reliable 40Gbps connectivity. **Warranty & Support:** Backed by 90-day limited warranty. Custom brand programming available for organizations requiring proprietary labeling. Ships from multiple US locations with free standard shipping on orders exceeding $99. Replaces OEM part number QSFP-H40G-ACU1M, offering cost-effective alternative without compromising performance or reliability.