The JBX05571 4m 100GBASE-CR4 QSFP28 to 4x SFP28 direct attach copper breakout cable represents an essential connectivity solution for modern data center architectures. As a fully compatible replacement for the Fortinet FN-CABLE-QSFP28-4SFP28-4, this passive breakout DAC cable delivers exceptional performance and reliability for 100GB network deployments. **Technical Specifications & Design:** Constructed with premium 26AWG twinax copper cable and robust plastic jacketing, this breakout solution provides superior signal integrity and durability. The cable meets IEEE 802.3bj specifications and QSFP28 MSA standards, ensuring compatibility across a wide range of networking equipment. Its 4-meter length accommodates flexible rack configurations and equipment spacing in both standard and high-density data center layouts. **Certification & Compliance:** Fully RoHS and ELV directive compliant (EU 2002/95/EC), with TUV and UL safety certifications. These rigorous standards ensure environmental responsibility and operational safety, meeting enterprise procurement requirements. **Performance Advantages:** As a passive DAC solution, this breakout cable eliminates power consumption concerns while maintaining exceptional 100GB throughput. The direct attach copper design reduces latency, making it ideal for latency-sensitive applications including high-frequency trading, cloud computing, and storage area networks. **Operating Conditions:** Operates reliably across 0-70°C (32-158°F) temperature ranges, maintaining consistent performance in various data center environments. The robust construction withstands repeated connections and moves typical in dynamic infrastructure. **Applications & Use Cases:** Perfect for Fortinet switch deployments requiring multi-lane breakout connectivity. Enables flexible port migration from QSFP28 to multiple SFP28 interfaces. Commonly deployed in hyperscale data centers, financial institutions, and enterprises requiring high-speed, cost-effective interconnects. **Value Proposition:** Offering significant cost savings compared to active breakout solutions while delivering equivalent performance. The Fortinet compatibility ensures seamless integration without learning curves. Free standard shipping and 90-day warranty provide additional peace of mind for enterprise customers. Choose the JBX05571 for dependable, standards-compliant 100GB breakout connectivity that maximizes your data center investment.