The JBX05655 2-meter QSFP28 to 4x SFP28 passive breakout DAC cable represents a cost-effective solution for enterprises migrating to 100GB infrastructure. This direct attach copper cable is specifically engineered to deliver the performance demands of modern data centers while maintaining backward compatibility with existing Extreme Networks equipment. **Technical Specifications:** This copper twinax cable features a QSFP28 connector on the primary end and four individual SFP28 connectors on the breakout end, enabling flexible network architecture configurations. The 30AWG gauge provides optimal impedance matching and signal propagation for 100GBASE-CR4 applications. Operating across 0-70°C temperature ranges ensures reliable performance in various datacenter environments. **Performance & Compatibility:** Fully qualified to IEEE 802.3bj specifications and QSFP28 MSA standards, this cable is engineered to replace Extreme Networks part number 100G-DACP-QSFP4SFP2M. The passive breakout design eliminates the complexity of active electronics, reducing power consumption and eliminating potential failure points associated with powered components. **Compliance & Certification:** Manufactured to strict RoHS and ELV directives (EU 2002/95/EC), this cable meets international environmental standards. TUV and UL safety certifications ensure compliance with global networking infrastructure requirements. **Applications:** Ideal for: • Data center network upgrades and expansions • High-density switch deployments • Direct server-to-switch connections • Enterprise campus network infrastructure • Cloud computing environments requiring reliable 100GB connectivity **Advantages:** The passive breakout configuration provides superior reliability compared to active alternatives, with zero power requirements and lower heat generation. The compact 2-meter length makes it suitable for equipment rack installations while maintaining excellent signal integrity. Custom brand programming is available for OEM requirements. **Warranty & Support:** Backed by a 90-day limited warranty with convenient shipping from US locations (Danville, CA and Beaufort, SC). Free standard shipping on qualifying orders ensures cost-effective deployment of your network infrastructure investments.