The JBX05671 4m 100GBASE-CR4 QSFP28 Passive Direct Attach Copper Cable represents the gold standard in high-speed enterprise networking solutions. Purpose-built for Extreme Networks environments, this cable delivers uncompromising performance in demanding data center and telecommunications applications. **Technical Excellence:** Constructed from premium copper with plastic jacketing, this 26AWG twinax cable adheres strictly to IEEE 802.3bj specifications and QSFP28 Multi-Source Agreement standards. The passive DAC (direct attach copper) design eliminates the complexity and power consumption associated with active cables, providing a more economical and reliable solution for enterprises seeking high-performance connectivity. **Superior Performance:** With 100GB data rate capability, this cable supports next-generation network speeds essential for modern applications including cloud computing, big data analytics, and high-frequency trading platforms. The 4-meter length strikes an optimal balance between flexibility and signal integrity, suitable for most data center rack configurations. **Industry Compliance & Certification:** Fully RoHS and ELV directive compliant (EU 2002/95/EC), this cable meets stringent environmental standards while maintaining TUV and UL safety certifications. These certifications ensure reliable performance in enterprise-grade installations and provide confidence in long-term deployment. **Seamless Integration:** As a verified Extreme Networks compatible solution, the JBX05671 provides drop-in compatibility with existing infrastructure. It replaces OEM part numbers 100G-DACP-QSFP4M, 10413-4M, 100G-QSFP-QSFP-P-0401, and AA1405031-E6-4M, simplifying procurement and inventory management. **Practical Advantages:** • Zero-latency passive design—no signal processing delays • Extended operating temperature range (0-70°C) • Durable construction withstands intensive data center environments • Compact 12x12x4 dimensions fit standard rack configurations • Shipped from US distribution centers (Danville, CA and Beaufort, SC) for rapid delivery **Value Proposition:** With 90-day limited warranty coverage and free standard shipping on orders exceeding $99, the JBX05671 delivers enterprise-grade connectivity at competitive pricing. Custom brand programming is available for OEM customers requiring white-label solutions. Ideal for network administrators, data center operators, and enterprise IT departments seeking reliable, standards-compliant high-speed connectivity without premium pricing. This cable represents intelligent infrastructure investment for organizations prioritizing performance, compliance, and cost efficiency.