The JBX06139 0.5m Cisco Compatible 10GBASE-CR SFP+ Active Direct Attach Copper Cable represents a cost-effective, high-performance solution for short-reach 10 Gigabit Ethernet connections. As an active DAC (Direct Attach Copper) cable, it provides superior performance characteristics compared to passive alternatives, particularly for extended cable runs or high-interference environments. **Technical Specifications:** This professional-grade networking cable meets SFF-8431 and SFF-8472 IEEE standards, ensuring compatibility with a wide range of network equipment. The 30AWG twinax copper construction provides optimal signal transmission with minimal attenuation, while the plastic jacketing offers durability and protection. At 0.5 meters, this cable is ideal for rack-mounted configurations, server interconnections, and switch-to-switch connections. **Performance & Reliability:** The active electronics embedded in this DAC cable amplify signals to overcome copper attenuation, making it suitable for demanding data center environments. Qualified to SFF-8431 specifications and operating reliably between 0-70°C, it delivers consistent 10GB performance regardless of deployment conditions. RoHS and EU directive 2002/95/EC compliance ensures environmentally responsible manufacturing. **Cisco Compatibility:** Direct replacement for Cisco OEM part number SFP-H10GB-ACU50CM, this cable integrates seamlessly into existing Cisco infrastructure without requiring firmware updates or reconfiguration. Compatible with Cisco Nexus, Catalyst, and other SFP+-equipped platforms. **Use Cases:** • Data center interconnections and east-west traffic • High-speed server clustering • Storage area network (SAN) connectivity • Enterprise network upgrades • Virtualization and cloud infrastructure **Quality Assurance:** Manufactured in Vietnam and China with rigorous quality control, this cable includes a 90-day limited warranty. Free standard shipping applies to orders exceeding $99, with fulfillment from distribution centers in Danville, CA and Beaufort, SC for rapid delivery. **Maintenance:** No special maintenance required. Store in cool, dry conditions when not in use, and avoid excessive bending or tension on connectors to preserve optimal performance.