The JBX42737 ST/APC to LC/UPC 30-meter duplex singlemode fiber patch cable represents a professional-grade solution for mission-critical fiber optic network connections. This TAA-compliant cable meets government procurement standards while delivering exceptional performance characteristics required by modern telecommunications infrastructure. **Technical Excellence:** Built with 9/125 singlemode fiber core and G.657.A1 glass construction, this cable achieves ultra-low attenuation rates of 0.25 dB/km at 1310 nm and 0.35 dB/km at 1550 nm wavelengths. The measured insertion loss of ≤0.35dB (typical 0.15dB) ensures minimal signal degradation, while return loss specification of ≥20dB provides exceptional optical performance. **Connectivity & Configuration:** The duplex configuration features ST/APC male connectors on one end and LC/UPC male connectors on the other, with Type A to B crossover polarity—the industry standard for most duplex patch cord applications. This versatile configuration enables seamless integration into diverse network architectures. **Durability & Protection:** The cable features OFNR (Optical Fiber Non-conductive Riser) rating, making it suitable for plenum and riser installations in commercial buildings. The distinctive yellow jacket provides high visibility for quick identification during installation and maintenance. At 1.8mm outside diameter with plastic accessories, the cable remains flexible while maintaining structural integrity. **Compliance & Standards:** TAA compliance ensures government procurement eligibility, while RoHS/ELV certification confirms environmental safety. All attenuation testing adheres to ANSI/TIA/EIA-455-171-A-2001 standards, guaranteeing quality assurance. **Use Cases:** Ideal for data centers, telecommunications facilities, campus networks, and carrier-class installations. Supports high-speed fiber optic communication requiring reliable signal transmission over 30-meter distances. **Warranty & Support:** Backed by 90-day limited warranty with free standard shipping on orders exceeding $99. Custom lengths available for specialized requirements.