The JBX42586 25-meter ST/APC to FC/APC duplex singlemode fiber patch cable represents the ideal solution for enterprise-level fiber optic network installations, data centers, and telecommunications infrastructure. Engineered to meet the most stringent performance requirements, this cable combines exceptional optical characteristics with compliance certifications demanded by government and corporate buyers. **Optical Performance & Specifications** Features a 9/125 singlemode core constructed with advanced G.657.A1 glass fiber technology, enabling superior bend performance without sacrificing signal integrity. The cable delivers consistent insertion loss of ≤0.35dB (typical 0.15dB) and impressive return loss of ≥20dB, ensuring minimal signal degradation across long runs. Attenuation specifications are precisely controlled at 0.25 dB/km (1310nm) or 0.35 dB/km (1550nm), meeting ANSI/TIA/EIA-455-171-A-2001 standards. **Connectivity & Configuration** The ST/APC to FC/APC connector combination supports Type A to B crossover polarity—the most common configuration for duplex patch cord applications. This arrangement ensures seamless integration with existing network infrastructure while maintaining optimal signal flow between transmit and receive paths. Both connector types feature APC (Angled Physical Contact) endfaces, minimizing back-reflection and maximizing signal quality. **Compliance & Safety** TAA (Trade Agreements Act) compliant, making this cable eligible for government procurement and contracts. RoHS and ELV directive compliant (EU 2002/95/EC), ensuring environmental responsibility and safe material composition. OFNR riser-rated jacketing allows installation in building risers and vertical pathways while meeting fire safety codes. **Build Quality & Durability** Construction includes a protective plastic accessory jacket with 1.8mm outside diameter, providing excellent abrasion resistance and flexibility. The yellow jacket improves visibility in crowded conduit environments, reducing installation errors and simplifying maintenance. Available in custom lengths for non-standard applications. **Shipping & Support** Qualifies for free standard shipping on orders exceeding $99, with convenient fulfillment from three US distribution centers (California, Texas, and South Carolina). Backed by a comprehensive 90-day limited warranty, ensuring peace of mind on your network investment.