The JBX06364 4m 25GBASE-CR SFP28 Passive Direct Attach Copper Cable represents a superior choice for enterprises and data center operators seeking reliable, cost-effective high-speed network connectivity. This cable is specifically engineered to meet the exacting demands of modern 25Gbps network deployments while maintaining compatibility with Extreme Networks infrastructure. **Technical Specifications:** This passive DAC cable features 26AWG twinax copper conductors with professional-grade plastic jacketing, delivering exceptional signal integrity across the full 4-meter length. The SFP28 connectors utilize copper contacts for optimal electrical performance and durability. Compliant with IEEE 802.3by specifications and SFF standards (SFF-8402, SFF-8472), this cable ensures interoperability with certified equipment. **Performance & Reliability:** As a passive direct attach solution, this cable eliminates the power consumption and heat generation associated with active electronics, resulting in lower total cost of ownership. The 25GBASE-CR standard provides consistent 25Gbps throughput suitable for demanding applications including virtual machine migration, backup operations, and real-time analytics workloads. **Compliance & Quality:** Manufactured to rigorous international standards, the cable carries RoHS, TUV, and UL certifications, demonstrating commitment to environmental responsibility and safety. The 90-day limited warranty provides peace of mind for critical infrastructure investments. **Compatibility & Applications:** Specifically designed to replace Extreme Networks original equipment part numbers (25G-DACP-SFP4M, 25G-SFP28-TWX-P-0401, 10521-4M), this cable integrates seamlessly into existing network architectures. Ideal for data center upgrades, high-performance computing clusters, and enterprise network expansions requiring reliable 25GB interconnectivity. **Shipping & Support:** Enjoy free standard shipping on orders exceeding $99, with convenient fulfillment from Danville, CA or Beaufort, SC locations. Custom brand programming options available for enterprise deployments.