The JBX05231 40GBASE-CR4 QSFP+ to SFP+ Direct Attach Copper Cable represents a premium networking solution designed for demanding datacenter and enterprise infrastructure applications. This 3-meter passive breakout cable is engineered to replace Juniper's QFX-QSFP-DACBO-3M, offering identical performance and compatibility at competitive pricing. **Technical Excellence** Constructed with 30AWG twinax copper conductors and protective plastic jacketing, this cable delivers uncompromised signal integrity across its 3-meter length. The passive design eliminates external power requirements, reducing overall system complexity and operating costs. The cable fully complies with IEEE 802.3ba specifications, ensuring 40GB data transmission rates with minimal latency. **Connector Architecture** The QSFP+ (Quad Small Form-factor Pluggable) to 4x SFP+ configuration enables efficient port density expansion. This breakout design allows single high-speed 40GB connections to be distributed across four 10GB ports, optimizing network flexibility and utilization in virtualized environments. **Compliance and Certification** With RoHS and TUV certifications, this cable meets stringent environmental and safety standards (EU directive 2002/95/EC). Operating temperature range of 0-70°C (32-158°F) ensures reliable performance across typical datacenter environments. **Juniper Compatibility** Direct compatibility with Juniper QFX5100, QFX5200, and other switches featuring QSFP+ ports makes installation straightforward with zero configuration hassles. The cable is a proven OEM replacement offering superior value without sacrificing quality or performance. **Practical Applications** Ideal for datacenter upgrades, network backbone consolidation, and high-speed interconnect scenarios. Perfect for organizations migrating from multiple 10GB connections to efficient 40GB infrastructure while maintaining backward compatibility. **Value Proposition** Offering free standard shipping on orders exceeding $99, a 90-day limited warranty, and custom brand programming availability, this DAC cable combines professional-grade reliability with customer-centric service. Ships from strategic US locations (Danville, CA and Beaufort, SC) for rapid delivery.