The JBX05529 4-meter 100GBASE-CR2 QSFP28 Direct Attach Copper Cable represents a cutting-edge solution for organizations seeking reliable, high-speed network interconnectivity. This breakout DAC cable is purpose-built for Extreme Networks compatibility, serving as a direct replacement for the OEM part number 10428-4M. **Technical Specifications:** This cable features dual QSFP28 connectors designed to deliver 100Gbps performance across a 4-meter span. The 26AWG twinax construction provides optimal signal integrity while maintaining flexibility for cable management in dense rack environments. Operating temperature specifications of 0-70°C (32-158°F) ensure reliable performance across varied data center climates. **Standards Compliance:** Fully qualified to IEEE 802.3bj specifications and QSFP28 MSA standards (SFF-8665), this cable meets stringent industry requirements. RoHS and ELV compliance ensures environmental responsibility, while UL and TUV certifications demonstrate commitment to safety standards. The cable adheres to EU directive 2002/95/EC. **Advantages Over Alternatives:** As a passive Direct Attach Copper cable, the JBX05529 offers significant advantages over active alternatives. Passive DACs consume minimal power, generate no heat, and introduce zero latency—critical factors in high-performance computing and data center applications. The cost-effectiveness of passive technology makes this solution ideal for budget-conscious enterprises without compromising performance. **Use Cases:** Perfect for data center interconnects, server-to-switch connections, and switch-to-switch implementations requiring short-reach, high-bandwidth solutions. Ideal for companies standardizing on Extreme Networks infrastructure seeking compatible, reliable cabling solutions. **Quality Assurance:** Backed by a 90-day limited warranty and manufactured in Vietnam and China with strict quality control standards. Custom brand programming is available for organizations requiring proprietary identification. Ships from multiple US locations (Danville, CA and Beaufort, SC) with free standard shipping on orders exceeding $99. **Care & Maintenance:** Store in dry conditions with protective caps installed when not in use. Avoid excessive bending to prevent twinax damage. Handle connectors carefully to prevent contact degradation. Inspect regularly for physical damage before installation.