The JBX42725 3-meter ST/APC to LC/UPC duplex singlemode fiber patch cable represents professional-grade connectivity for demanding telecommunications and data center environments. This cable is meticulously engineered to deliver reliable, high-speed signal transmission with minimal loss and superior optical performance. **Technical Specifications:** This duplex patch cable features dual 9/125 singlemode fiber strands with G.657.A1 glass construction, delivering exceptional signal clarity across telecommunications wavelengths. Attenuation performance is rigorously tested to ANSI/TIA/EIA-455-171-A-2001 standards, with insertion loss of ≤0.35dB (0.15dB typical) and return loss of ≥20dB. The cable maintains consistent performance at both 1310 nm (0.25 dB/km) and 1550 nm (0.35 dB/km) wavelengths. **Design & Compliance:** The yellow OFNR (Optical Fiber Non-Conductive, Riser-rated) jacket provides fire-resistant protection suitable for installation in vertical cable runs and plenum spaces. TAA compliance ensures suitability for government procurement and federally-funded projects. RoHS/ELV directives compliance guarantees environmental responsibility and regulatory adherence. **Connector Configuration:** The ST/APC-to-LC/UPC connector pairing with Type A to B crossover polarity is industry-standard for duplex patch cords, enabling seamless integration with most enterprise network infrastructure. The 1.8mm outside diameter provides space-efficient installation in high-density environments. **Ideal Applications:** - Telecommunications networks - Enterprise data centers - Campus backbone connections - Government and institutional networks - High-speed data transmission systems **Customization & Support:** Custom lengths are available to accommodate specific installation requirements. Product ships from multiple U.S. locations (Danville CA, Fort Worth TX, Beaufort SC) with free standard shipping on orders over $99, plus a 90-day limited warranty for peace of mind.