The JBX42497 30-meter ST/APC to ST/UPC duplex fiber patch cable represents a premium solution for telecommunications professionals, network engineers, and data center technicians requiring reliable, standards-compliant fiber connectivity. **Technical Excellence** This duplex cable utilizes 9/125 singlemode fiber with G.657.A1 specifications, specifically engineered for long-distance signal transmission with minimal attenuation. The cable achieves exceptional performance metrics: insertion loss of ≤0.35dB (typical 0.15dB) and return loss ≥20dB, tested per ANSI/TIA/EIA-455-171-A standards. Performance is verified at both 1310nm and 1550nm wavelengths, ensuring compatibility with diverse network infrastructures. **Compliance & Standards** TAA (Trade Agreement Act) compliant status qualifies this cable for federal and government contracts. RoHS/ELV directives compliance (EU 2002/95/EC) demonstrates commitment to environmental standards and hazardous substance restrictions. Manufacturing across multiple regions (Taiwan, US, China) ensures supply chain flexibility. **Practical Design** The bright yellow OFNR (Optical Fiber Non-conductive Riser) jacket provides excellent visibility in crowded installations while offering flame-retardant properties suitable for building risers and plenum spaces. The 1.8mm outside diameter balances durability with manageable bend radius. Type A to B crossover polarity configuration represents the industry standard for duplex patch cord applications. **Flexibility & Support** While this product comes in 30-meter lengths, custom lengths are available for specialized applications. Free standard shipping on orders exceeding $99 enhances value. Backed by a 90-day limited warranty, providing peace-of-mind protection. **Applications** Ideal for telecommunications rooms, data centers, network closets, and long-distance signal transmission scenarios where singlemode performance is essential. Compatible with systems requiring ST/APC to ST/UPC connectivity for backbone cabling and inter-building communications.