The JBX05578 5-meter QSFP28 to SFP28 breakout DAC cable is engineered to meet the demanding requirements of modern 100GB network deployments. As a direct compatible alternative to Arista's CAB-Q-4S-100G-5M, this cable provides seamless integration into existing network infrastructure while delivering superior performance and reliability. **Technical Specifications:** This passive Direct Attach Copper cable features a robust 26AWG twinax copper conductor with plastic jacketing, providing optimal signal integrity and durability. The QSFP28 connector on the head side breaks out to four individual SFP28 connectors, enabling flexible port management and network scalability. Operating across a temperature range of 0-70°C (32-158°F), the cable maintains consistent performance in diverse environmental conditions. **Standards & Compliance:** Fully qualified to IEEE 802.3bj specifications and QSFP28 MSA standards, ensuring compatibility with leading network equipment manufacturers. The cable meets RoHS/ELV directives and carries TUV and UL safety certifications, guaranteeing compliance with international regulatory requirements. **Advantages of Passive DAC Technology:** Unlike active solutions, this passive breakout cable requires no external power, reducing deployment complexity and operational costs. The passive design eliminates potential points of failure while maintaining 100GBASE-CR4 performance across the full 5-meter span, making it ideal for short-to-medium distance data center interconnects. **Applications:** Ideal for enterprise data centers, service providers, and telecommunications environments requiring cost-effective 100GB connectivity. Perfect for server-to-switch, switch-to-switch, and storage area network (SAN) implementations where flexibility and reliability are paramount. **Quality & Warranty:** Manufactured to rigorous quality standards with components sourced from Vietnam and China. Backed by a comprehensive 90-day limited warranty. Ships from Danville, CA and Beaufort, SC locations with free standard shipping on orders exceeding $99. Custom brand programming available upon request for enterprise customers. **Installation & Maintenance:** Simple plug-and-play installation requires no configuration. The durable twinax construction resists interference and environmental stress, requiring minimal maintenance. Ensure proper cable routing to avoid excessive bending and maintain optimal performance longevity.