The JBX05568 4-meter 100GBASE-CR4 QSFP28 to 4x SFP28 Direct Attach Copper breakout cable represents enterprise-grade network infrastructure designed for demanding high-speed connectivity requirements. This passive breakout DAC cable is specifically engineered for compatibility with Extreme Networks equipment, offering a cost-effective solution for organizations seeking to expand their 100GB network capabilities. **Technical Excellence** This high-performance cable utilizes 26AWG twinax copper conductors with durable plastic jacketing, providing exceptional electromagnetic shielding and signal clarity. The QSFP28 connector interfaces with a single 100GB port, while the four SFP28 connectors enable distribution to multiple devices, making it an ideal solution for network aggregation and distribution scenarios. The cable's 4-meter length provides optimal flexibility for rack-to-rack connections and equipment spacing in modern data centers. **Standards & Compliance** Fullly qualified to IEEE 802.3bj specifications and QSFP28 MSA standards, this cable ensures seamless interoperability within certified network ecosystems. It carries important certifications including RoHS, ELV, TUV, and UL approval, demonstrating compliance with environmental protection and safety directives including EU directive 2002/95/EC. These certifications provide confidence in long-term reliability and regulatory compliance. **Performance Characteristics** As a passive DAC solution, this cable eliminates the need for powered modules, reducing power consumption and simplifying deployments. Operating reliably across 0 to 70°C temperature ranges, it performs consistently in various environmental conditions. The cable replaces multiple OEM part numbers including Extreme Networks' 100G-DACP-QSFP4SFP4M, ensuring direct compatibility with existing infrastructure. **Practical Applications** Ideal for data center network expansions, storage area network (SAN) implementations, and high-performance computing (HPC) environments. This breakout cable facilitates seamless integration when upgrading from lower-speed infrastructure or consolidating multiple connections into unified 100GB pipes. **Value Proposition** With free standard shipping on orders over $99 and 90-day limited warranty coverage, this cable offers exceptional value. Custom brand programming is available for resellers and enterprises with specific branding requirements. Ships from US locations in Danville, CA and Beaufort, SC, ensuring rapid domestic delivery.