The JBX42316 25-meter SC/APC to FC/UPC duplex singlemode fiber patch cable represents a sophisticated solution for professionals requiring precision fiber optic connectivity. This cable is specifically engineered to meet the exacting demands of telecommunications infrastructure, data centers, and enterprise network deployments. **Technical Excellence:** This duplex configuration features two separate singlemode fibers, each with a 9/125 micrometer core specification, enabling simultaneous bidirectional communication. The SC/APC (angled physical contact) to FC/UPC (ultraphysical contact) connector pairing delivers superior performance characteristics, with measured insertion loss of ≤0.35dB at typical conditions (0.15dB) and return loss exceeding 20dB. When measured at 1310nm, attenuation is 0.25dB/km; at 1550nm, 0.35dB/km—indicating minimal signal degradation over the 25-meter span. **Quality Construction:** The cable utilizes G.657.A1 glass fiber, optimized for bending characteristics while maintaining single-mode performance. The protective 1.8mm diameter yellow jacket features OFNR (Optical Fiber Nonconductive Riser) rating, providing flame resistance suitable for vertical runs in building risers. The bright yellow color simplifies identification and organization in complex installations. **Compliance & Standards:** Fully TAA (Trade Agreements Act) compliant, making this cable eligible for government and institutional procurement. RoHS/ELV directive compliance (EU 2002/95/EC) ensures environmental responsibility. Attenuation has been tested and verified according to ANSI/TIA/EIA-455-171-A-2001 standards. **Practical Advantages:** Custom length availability accommodates non-standard installation requirements. The 90-day limited warranty provides purchase protection, while free standard shipping on orders exceeding $99 reduces total cost of ownership. Multiple manufacturing sources ensure consistent availability and supply chain resilience. **Ideal Applications:** Perfect for connecting telecommunications equipment, LAN interconnections, fiber-to-the-building installations, equipment rack interconnections, and specialized laboratory configurations requiring duplex communication. **Specifications Summary:** - Length: 25 meters - Connectors: SC/APC to FC/UPC (Type A to B crossover) - Fiber Type: 9/125 singlemode (G.657.A1) - Insertion Loss: ≤0.35dB typical - Return Loss: ≥20dB - Outside Diameter: 1.8mm - Jacket Rating: OFNR Riser Rated - Color: Yellow - Warranty: 90 days limited