The JBX05164 Cisco QSFP-4SFP10G-CU5M represents the gold standard in passive breakout cable technology for modern data center architectures. This 5-meter direct attach copper (DAC) cable seamlessly bridges QSFP+ and quad SFP+ interfaces, enabling flexible network topology configurations without sacrificing performance or introducing latency. **Technical Excellence** Designed to IEEE 802.3ba and SFF-8436 specifications, this 40GBASE-CR4 compatible cable delivers full 40Gbps bandwidth. The 26AWG twinax copper construction provides superior signal integrity with minimal attenuation, while the passive design eliminates active components that could introduce latency or require external power. Each connector features precision-engineered copper contacts for consistent, reliable performance across thousands of connection cycles. **Compliance & Reliability** Fully RoHS and ELV compliant with comprehensive TUV and UL safety certifications, this cable meets stringent regulatory requirements for enterprise deployments. The robust plastic jacketing protects conductors while maintaining flexibility for installation in space-constrained environments. Temperature specifications of 0-70°C ensure dependable operation across diverse data center conditions. **Enterprise Applications** Perfect for high-density server environments, storage arrays, and core network infrastructure, this breakout cable reduces port density pressure on switching equipment. Organizations can leverage existing QSFP+ investments while segmenting traffic across multiple SFP+ interfaces. The OEM-equivalent design (replaces Cisco QSFP-4SFP10G-CU5M) ensures seamless integration into existing inventories. **Shipping & Support** Ships from US locations (Danville, CA and Beaufort, SC) with free standard shipping on qualifying orders. Backed by a 90-day limited warranty and available with custom brand programming for enterprise requirements. Manufactured in Vietnam and China with strict quality controls.