The JBX43555 20m ST/APC to FC/UPC Simplex Singlemode Fiber Patch Cable represents a professional-grade solution for critical network connectivity requirements. Engineered with precision manufacturing from facilities in Taiwan, the United States, and China, this cable combines reliability with cost-effectiveness. **Technical Specifications:** This simplex fiber patch cable features a 9/125 singlemode core utilizing G.657.A1 glass fiber technology, specifically designed for long-distance, high-bandwidth signal transmission. The cable achieves exceptional performance metrics with insertion loss of ≤0.35dB (typical 0.15dB) and return loss ratings of ≥20dB, meeting ANSI/TIA/EIA-455-171-A-2001 standards. Attenuation rates of 0.25 dB/km at 1310nm and 0.35 dB/km at 1550nm ensure minimal signal degradation across extended distances. **Construction & Safety:** The yellow OFNR (Optical Fiber Non-conductive Riser) rated jacket provides fire-safety compliance while offering superior visibility in cable management environments. At 1.8mm outside diameter, the cable balances durability with installation flexibility. Its straight-through polarity configuration ensures straightforward deployment in standard network architectures. **Compliance & Certification:** Fully TAA compliant and RoHS/ELV directive compliant (EU 2002/95/EC), this cable meets government procurement standards and environmental regulations. The 90-day limited warranty provides peace-of-mind protection for your investment. **Applications:** Perfect for data centers, telecommunications networks, enterprise backbone connectivity, fiber-to-the-premises installations, and test equipment connections. The ST/APC to FC/UPC connector combination accommodates diverse network configurations. **Custom Solutions:** Require different lengths? Custom cable options are available to match your exact network specifications, eliminating excess cable and improving installation efficiency. **Shipping & Support:** Enjoy free standard shipping on orders exceeding $99, with convenient fulfillment from Danville CA, Fort Worth TX, or Beaufort SC locations. Professional-grade packaging (10x10x10 case) ensures safe delivery of your critical network components.