The JBX05671 4-meter 100GBASE-CR4 QSFP28 passive direct attach copper cable represents the ideal solution for data center operators and network administrators seeking reliable, cost-effective 100GB connectivity. This passive DAC cable eliminates the need for powered transceiver modules, reducing operational costs and complexity while delivering sustained high-speed performance. **Technical Specifications:** Designed to IEEE 802.3bj specifications, this cable features precision 26AWG twinax copper conductors with high-quality plastic jacketing. The dual QSFP28 connectors ensure reliable mating with compatible equipment, supporting full 100GB data rates across the 4-meter distance. Dimensions of 12x12x4mm keep the cable compact for dense equipment installations. **Compatibility & Applications:** Perfectly suited for Extreme Networks infrastructure, this cable replaces multiple OEM part numbers including 100G-DACP-QSFP4M, 10413-4M, 100G-QSFP-QSFP-P-0401, and AA1405031-E6-4M. Ideal applications include: • Data center switch-to-server connections • High-speed network storage systems • Enterprise backbone infrastructure • Equipment bay interconnections • Network upgrade and expansion projects **Quality Assurance:** This product carries RoHS compliance and full TUV/UL safety certifications, ensuring environmental responsibility and operational safety. The 90-day limited warranty provides peace of mind for your network infrastructure investments. Manufactured in Vietnam and China using rigorous quality standards. **Advantages Over Alternatives:** Unlike active optical cables or transceivers, passive DAC cables generate no heat, consume no power, and have no complex electronics to fail. The 4-meter length bridges typical equipment distances while maintaining signal integrity. When compared to fiber optic solutions, this copper cable offers superior cost-effectiveness for shorter distances without requiring special handling. **Order & Shipping:** Qualify for free standard shipping on orders exceeding $99. Ships from facilities in Danville, CA and Beaufort, SC for rapid delivery. Custom brand programming is available for enterprise customers requiring private label solutions.