The JBX05155 represents a premium solution for organizations requiring reliable, high-speed network infrastructure. As a direct attach copper (DAC) breakout cable, it provides an economical alternative to fiber optics while maintaining exceptional performance standards demanded by modern data centers and enterprise networks. **Technical Specifications:** This 4-meter passive breakout cable features a QSFP+ connector on the transmit end and four SFP+ connectors on the receive end, enabling flexible network architecture. The 26AWG twinax copper construction ensures optimal signal transmission at 40GB data rates, complying with IEEE 802.3ba and SFF-8436 standards. Manufactured in Vietnam and China with strict quality controls, the cable operates reliably in temperature ranges from 0 to 70°C (32 to 158°F). **Key Benefits:** As a passive solution, the JBX05155 eliminates power consumption and heat generation associated with active equipment, reducing operational costs and environmental impact. Its direct attachment design minimizes latency, making it ideal for low-latency trading platforms, real-time analytics, and high-frequency applications. The robust plastic jacketing protects copper conductors from environmental stress, while RoHS and EU 2002/95/EC compliance ensures safe handling and disposal. **Cisco Compatibility:** Engineered specifically to replace Cisco's QSFP-4SFP10G-CU4M, this cable integrates seamlessly into existing Cisco infrastructure. Whether upgrading legacy systems or expanding current networks, the JBX05155 provides plug-and-play compatibility without requiring configuration or firmware updates. **Applications:** Ideal for data center backbone connectivity, high-performance computing clusters, storage area networks (SANs), and enterprise network consolidation projects. The breakout configuration supports load-balancing scenarios where traffic distribution across multiple 10GB ports enhances bandwidth utilization. **Quality Assurance:** Backed by a 90-day limited warranty and shipped from strategically located U.S. warehouses in California and South Carolina, the JBX05155 ensures rapid delivery and responsive customer support. Custom brand programming is available for enterprises requiring standardized deployments across multiple locations. **Maintenance:** Minimal maintenance required due to passive design. Regularly inspect connectors for dust or debris, and ensure proper cable routing to prevent crimping or stress on twinax conductors. Store in temperature-controlled environments when not deployed.