The JBX05414 2.5m 40GBASE-CR4 QSFP+ Passive Direct Attach Copper Cable is a high-performance networking solution specifically designed for Extreme Networks infrastructure. This premium quality DAC cable combines reliability, performance, and cost-effectiveness for modern data center environments. **Technical Specifications:** With 30AWG twinax copper construction and QSFP+ connectors on both ends, this 2.5-meter cable supports 40GB data rates compliant with IEEE 802.3ba and SFF-8436 standards. The passive design requires no external power, reducing operational costs and system complexity while maintaining signal integrity across the connection. Operating temperatures range from 0 to 70°C (32 to 158°F), making it suitable for diverse deployment scenarios. **Compatibility & Performance:** Engineered specifically for Extreme Networks platforms, this cable replaces multiple OEM part numbers including 40G-DACP-QSFP2Z5M, 10312-250C, and others. The passive direct attach design ensures plug-and-play installation without additional configuration. **Compliance & Safety:** Fully RoHS and ELV compliant in accordance with EU directive 2002/95/EC, this cable meets TUV and UL safety certifications. The copper construction with plastic jacketing provides durability and protection in rack environments. **Ideal Applications:** Perfect for connecting switches, routers, and servers in data centers requiring high-speed, low-latency interconnectivity. The 2.5m length offers flexibility for various rack configurations while the passive design keeps costs lower than active alternatives. **Warranty & Support:** Backed by a 90-day limited warranty and custom brand programming available for enterprise deployments. Ships from US locations (Danville, CA and Beaufort, SC) with free standard shipping on orders exceeding $99. This reliable, certified solution provides exceptional value for network infrastructure upgrades.