The JBX05957 2.5m QSFP56 Direct Attach Copper Cable represents a reliable solution for modern data center networking demands. This passive DAC cable is specifically designed to be compatible with Arista networking equipment, replacing the OEM part number C-Q200-Q200-2.5M while offering superior value and availability. **Key Features & Benefits:** This cable supports 200GBASE-CR4 transmission standards, enabling next-generation network speeds without requiring active optical components. The passive design eliminates power requirements, reducing operational costs and heat generation in densely packed server environments. The 26AWG twinax copper construction provides excellent signal integrity and low attenuation across the 2.5-meter span, suitable for direct switch-to-switch or switch-to-NIC connections. **Technical Specifications:** The cable features QSFP56 connectors on both ends, meeting IEEE 802.3cd and QSFP56 MSA standards. With dimensions of 12x12x3mm and a 2.5-meter length, it accommodates standard rack configurations. Operating temperature range of 0-70°C ensures reliable performance in climate-controlled data centers. The cable is RoHS and TUV certified, complying with EU Directive 2002/95/EC. **Applications & Use Cases:** Ideal for data center operators upgrading to 200G infrastructure, this cable serves interconnect applications between switches, routers, and high-performance servers. Its cost-effectiveness compared to active alternatives makes it suitable for large-scale deployments. **Quality Assurance:** Backed by a 90-day limited warranty and eligible for free standard shipping on orders exceeding $99, this product ships from US locations (Danville, CA and Beaufort, SC), ensuring quick delivery. Custom brand programming is available for enterprise customers requiring specific configurations.