The JBX43019 40-meter LC/APC to LC/UPC simplex singlemode fiber patch cable represents a premium solution for demanding telecommunications and data center environments. Engineered with precision-grade 9/125 micron G.657.A1 singlemode fiber, this cable delivers exceptional signal integrity across extended distances while maintaining minimal signal loss. **Technical Excellence:** This cable meets rigorous industry standards with insertion loss performance of ≤0.35dB at 1550nm wavelength (0.25dB/km at 1310nm), ensuring minimal signal degradation. Return loss specification of ≥20dB provides superior signal quality and network stability. All attenuation measurements comply with ANSI/TIA/EIA-455-171-A-2001 standards, guaranteeing consistent, field-tested performance. **Construction & Durability:** The 1.8mm diameter cable features OFNR (Optical Fiber Non-conductive Riser) rated jacketing, meeting stringent building codes for indoor vertical cable runs. The yellow color jacket provides easy identification in complex network installations. RoHS/ELV compliant manufacturing ensures environmental responsibility without compromising quality. **Professional Features:** TAA (Trade Agreements Act) compliance makes this cable ideal for U.S. government and federal projects. The straight-through polarity configuration enables direct LC/APC to LC/UPC connections with LC/APC providing superior return loss characteristics. G.657.A1 fiber offers enhanced bend radius performance, reducing installation stress and extending cable lifespan. **Practical Applications:** Perfect for campus network interconnects, data center backbone connections, telecommunications infrastructure upgrades, and government-regulated installations. The 40-meter length accommodates most vertical and horizontal routing requirements in multi-floor installations. **Warranty & Support:** Included 90-day limited warranty provides peace of mind. Ships from multiple U.S. locations for rapid delivery. Custom length options available to meet specific project requirements. Free standard shipping on orders exceeding $99. **Value Proposition:** Invest in reliable, standards-compliant fiber connectivity that reduces downtime risk and future-proofs your network infrastructure investment.