The JBX05161 4-meter Juniper-compatible QSFP+ to SFP+ direct attach copper breakout cable is a critical component for modern data center infrastructure. Engineered to replace the Juniper QFX-QSFP-DACBO-4M, this passive breakout solution provides an economical way to maximize port utilization without requiring active electronics or additional power consumption. Technical Specifications: This cable implements the 40GBASE-CR4 standard, delivering four independent 10Gbps channels through a single QSFP+ connector. The 26AWG twinax construction balances signal integrity with flexibility, while the plastic jacketing provides durability in dynamic environments. At 4 meters, the cable accommodates typical data center spacing between top-of-rack and mid-row switches. Performance & Reliability: As a passive DAC solution, this cable operates without power requirements or latency introduction, making it ideal for latency-sensitive applications like financial trading, cloud infrastructure, and high-performance computing. The copper construction ensures excellent signal fidelity across the 40GB channel, while RoHS compliance and international safety certifications (TUV, UL) demonstrate adherence to global environmental and safety standards. Applications & Use Cases: Network architects leverage this breakout cable to expand 10GbE connectivity from aggregation equipment. It's particularly valuable in virtualized environments where additional server uplinks are needed without hardware replacement. Compatible with Juniper QFX series switches and any QSFP+-equipped networking equipment supporting 40GBASE-CR4. Deployment Considerations: The passive design operates within 0-70°C temperature ranges typical of climate-controlled data centers. Standard shipping available from multiple US locations (Danville, CA and Beaufort, SC) with free shipping on orders exceeding $99. Custom brand programming is available for resellers and integrators. Warranty & Support: Backed by a 90-day limited warranty, this cable represents a cost-effective upgrade path for existing infrastructure. The standardized connectors and compliance certifications ensure compatibility with current and future equipment investments.