The JBX05135 1m Cisco QDD-400-CU1M compatible 400GBASE-CR8 QSFP-DD Direct Attach Copper cable represents the pinnacle of modern high-speed data center connectivity. Designed for enterprises and service providers requiring robust 400GB/s interconnects, this passive DAC solution delivers exceptional performance without the complexity of active components. **Technical Specifications:** This cable meets rigorous 400GBASE-CR8 IEEE standards and supports QSFP-DD MSA (Multi-Source Agreement) specifications with CMIS (Common Management Interface Specification) compliance. The 30AWG twinax copper construction provides optimal signal integrity over the 1-meter length, ensuring reliable transmission for bandwidth-intensive applications. Dimensions of 12x12x2mm accommodate standard rack-mounted equipment layouts. **Performance & Reliability:** As a passive DAC cable, the JBX05135 eliminates latency inherent in active components while consuming zero additional power. The QSFP-DD form factor provides maximum density in modern network architectures. Operating across 0-70°C, this cable adapts to various data center environmental conditions. Its copper construction with plastic jacketing ensures durability and long-term performance in production environments. **Compliance & Certification:** Fully RoHS and ELV compliant per EU Directive 2002/95/EC, this cable meets stringent environmental and safety standards. TUV and UL certifications confirm adherence to international electrical safety protocols. The commodity classification (8544.42.9090) validates proper import/export documentation. **Compatibility & Applications:** Direct replacement for Cisco QDD-400-CU1M, this cable integrates seamlessly into existing Cisco infrastructure. Ideal for: • Data center top-of-rack (ToR) switching • Server-to-switch connections • Switch-to-switch interconnects • High-frequency trading environments • Cloud service provider deployments • Storage area networks (SAN) **Ordering & Support:** Ships from strategically located US warehouses (Danville, CA and Beaufort, SC) with free standard shipping on orders exceeding $99. Custom brand programming available for OEM partners. 90-day limited warranty provides peace of mind for critical deployments.