The JBX42605 3-meter FC/APC to ST/UPC Duplex Singlemode Fiber Patch Cable represents professional-grade optical connectivity designed for mission-critical network infrastructure. This dual-strand cable accommodates bidirectional communication with its duplex configuration, utilizing Type A to B crossover polarity—the industry standard for duplex patch cords connecting different fiber optic connector types. **Technical Excellence** Built with 9/125 singlemode fiber and G.657.A1 glass composition, this cable delivers exceptional optical performance. With insertion loss of just ≤0.35dB (typical 0.15dB) and return loss exceeding 20dB, the JBX42605 minimizes signal degradation over its 3-meter length. Attenuation specifications of 0.25 dB/km at 1310nm and 0.35 dB/km at 1550nm align with industry standards for singlemode transmission windows, ensuring compatibility with both legacy and modern network equipment. **Quality and Compliance** The yellow OFNR (Riser Rated) jacket provides durability, flame resistance, and easy identification in multi-cable installations. At 1.8mm outer diameter, the cable fits standard cable management systems while protecting the optical fiber core. TAA (Trade Agreements Act) compliance and RoHS/ELV certification make this cable suitable for government and regulated environments. All cables are attenuation tested according to ANSI/TIA/EIA-455-171-A-2001 standards, guaranteeing performance validation before shipment. **Practical Applications** Ideal for data center interconnections, telecommunications facilities, financial institutions, healthcare networks, and enterprise campuses, this patch cable bridges FC/APC and ST/UPC equipped equipment seamlessly. The duplex design enables full-duplex communication for higher-bandwidth applications. **Flexibility and Support** Available in custom lengths for non-standard installations, the JBX42605 offers adaptability for unique network layouts. Backed by a 90-day limited warranty and shipped from multiple US distribution centers (Danville CA, Fort Worth TX, Beaufort SC), orders over $99 qualify for free standard shipping. Available in bulk packaging (10x10x10 case units) for enterprises with large-scale deployments. Choose the JBX42605 for reliable, standards-compliant fiber optic connectivity that meets demanding professional network requirements.