The JBX05961 2.5m 200GBASE-CR4 QSFP56 Direct Attach Copper Cable is a mission-critical networking component engineered for organizations requiring ultra-high-speed, ultra-low-latency data transmission in enterprise and data center environments. As a purpose-built passive DAC cable, it eliminates the complexity and cost associated with active electronics while maintaining exceptional signal integrity across extended distances. ## Technical Excellence This cable utilizes premium 26AWG twinax copper construction, delivering optimal impedance matching and minimal signal attenuation. The QSFP56 connectors feature precision engineering to ensure flawless mating cycles and reliable performance under demanding conditions. Full compliance with IEEE 802.3cd specifications guarantees interoperability with standards-compliant equipment, while CMIS (Common Management Interface Specification) support provides advanced diagnostics and monitoring capabilities. ## NVIDIA Mellanox Compatibility Purpose-designed for NVIDIA Mellanox ecosystems, this cable directly replaces OEM part numbers 980-9I54L-00V02A, MCP1650-H02AE26, and MCP1650-V02AE26, offering substantial cost savings compared to original manufacturer cables. Thousands of data center deployments rely on compatible Mellanox hardware, and this cable ensures seamless integration without performance compromises. ## Superior Reliability & Compliance Full RoHS/ELV directive compliance (EU 2002/95/EC) ensures environmental responsibility without sacrificing performance. TUV and UL safety certifications provide confidence in electrical safety and product quality. The robust plastic jacketing protects copper conductors from environmental stressors while maintaining flexibility for installation in tight rack spaces. ## Ideal Applications • High-speed data center interconnects • Cloud computing infrastructure • Financial trading networks requiring ultra-low latency • Scientific computing and HPC clusters • Enterprise storage area networks (SANs) • Switch fabric upgrades for 200G deployments ## Operational Features With an operating temperature range of 0-70°C (32-158°F), this cable performs reliably in controlled data center environments. The 2.5-meter length provides optimal reach for standard rack-to-rack connections while maintaining impedance consistency. Passive design eliminates power consumption concerns and reliability issues associated with active electronics. ## Value Proposition Choosing this cable provides exceptional value: premium construction at competitive pricing, full compliance certifications, NVIDIA Mellanox validated compatibility, and comprehensive 90-day limited warranty coverage. Free standard shipping on orders exceeding $99 enhances affordability, while rapid fulfillment from strategically located distribution centers in California and South Carolina ensures quick deployment.