The JBX05071 400GBASE-CR8 QSFP-DD to 8x SFP56 Direct Attach Copper Breakout Cable represents a critical infrastructure component for modern high-speed network deployments. At 2.5 meters, this passive copper breakout solution provides the optimal balance between cable management flexibility and signal integrity for data center and enterprise network environments. **Technical Specifications:** This cable implements the 400GBASE-CR8 standard, enabling a single 400GB QSFP-DD connection to be bifurcated into eight parallel 50GB SFP56 connections. The 28AWG twinax copper conductors deliver superior signal quality with minimal crosstalk, while the plastic jacketing protects against physical damage and environmental stress. Manufactured to precision tolerances (12x12x3mm form factor), the connectors ensure reliable mating cycles and sustained performance. **Performance & Reliability:** Operating across 0-70°C temperature ranges, this cable maintains consistent performance in diverse deployment scenarios. The passive design eliminates power consumption and heat generation, reducing operational costs while improving system reliability. Full compliance with IEEE 400GBASE-CR8 and QSFP-DD MSA specifications guarantees interoperability with certified Juniper equipment and infrastructure. **Compliance & Quality Assurance:** RoHS and TUV certification confirms adherence to the strictest environmental and safety standards. The cable meets EU directive 2002/95/EC requirements, ensuring compatibility with regulated procurement environments. A 90-day limited warranty provides peace of mind, while custom brand programming options accommodate enterprise labeling requirements. **Applications & Use Cases:** Ideal for data center interconnects, high-frequency trading environments, cloud infrastructure expansion, and enterprise campus networks. This breakout cable enables cost-effective 400G deployment by allowing phased 50G port adoption without requiring complete infrastructure overhauls. Perfect for organizations transitioning to next-generation network speeds while maintaining investment protection. **Shipping & Support:** Ships from US distribution centers in Danville, CA and Beaufort, SC. Free standard shipping available on qualifying orders, ensuring rapid deployment with minimal logistics friction. Manufactured in Vietnam and China to stringent quality control standards.