The JBX42301 SC/APC to FC/UPC duplex singlemode fiber patch cable represents professional-grade optical connectivity for mission-critical network environments. This 1-meter cable combines precision engineering with compliance certifications required by government and enterprise procurement standards. **Technical Specifications:** Feturing a 9/125 singlemode core with G.657.A1 grade glass fiber, this cable delivers superior performance across standard telecom wavelengths. The SC/APC (angled physical contact) connector on one end and FC/UPC (straight physical contact) connector on the other create a Type A to B crossover configuration—the most common duplex patch cord polarity. Insertion loss remains exceptionally low at ≤0.35dB (typical 0.15dB), while return loss exceeds 20dB, ensuring signal integrity for long-distance transmissions. Attenuation specifications of 0.25 dB/km at 1310 nm and 0.35 dB/km at 1550 nm comply with industry standards. **Build Quality & Compliance:** The 1.8mm outside diameter jacket features OFNR (Optical Fiber Non-conductive Riser) rating, meeting fire safety codes for indoor installations. Yellow coloring aids identification in high-density cable environments. RoHS/ELV compliant construction and TAA (Trade Agreements Act) certification ensure regulatory adherence for government and institutional buyers. Construction from Taiwan, US, or China facilities maintains consistent quality standards. **Applications & Use Cases:** Ideal for data centers, telecommunications infrastructure, enterprise networks, and scientific laboratories requiring reliable singlemode transmission. The duplex design supports simultaneous bi-directional communication, perfect for backbone connections and long-distance signal transmission. **Why Choose This Cable:** With 90-day warranty protection and free standard shipping on orders exceeding $99, this represents excellent value for professional network installations. Custom lengths available accommodate non-standard deployment requirements. Ships from multiple US locations (Danville CA, Fort Worth TX, Beaufort SC) for rapid delivery.