The JBX42437 30-Meter FC/APC to FC/UPC Duplex Singlemode Fiber Patch Cable is a professional-grade solution designed for mission-critical fiber optic network installations. As a duplex cable with two individual fiber strands, it supports full-duplex communication protocols essential for modern telecommunications and data center environments. **Technical Specifications:** Built on a robust 9/125 singlemode core with G.657.A1 bend-insensitive glass fiber, this cable minimizes signal loss during installation and maintenance. With insertion loss of just 0.15dB typical (≤0.35dB maximum) and return loss exceeding 20dB, it ensures signal integrity across 1310nm and 1550nm wavelengths. The 1.8mm outer diameter provides flexibility for tight routing while maintaining durability. **Connector Configuration:** The FC/APC (angled physical contact) to FC/UPC (ultra-polished connector) configuration delivers Type A to B crossover polarity—the industry standard for duplex patch cords. This combination is optimal for environments requiring mixed connector types or transitional network setups. **Installation & Compliance:** Featuring OFNR (Optical Fiber Nonconductive Riser) rating, this cable meets building fire codes for vertical runs between floors without conduit. The distinctive yellow jacket provides instant visual identification, reducing installation errors in complex cabling scenarios. RoHS/ELV compliant construction ensures environmental responsibility and government procurement eligibility. **Durability & Warranty:** Manufactured to stringent ANSI/TIA/EIA-455-171-A standards with quality testing at multiple wavelengths, the cable delivers reliable performance in demanding environments. Each unit includes a 90-day limited warranty covering defects in materials and workmanship. **Customization Available:** While this 30m configuration suits most installations, custom lengths are available for specialized applications. Multiple U.S. fulfillment centers (Danville CA, Fort Worth TX, Beaufort SC) ensure rapid delivery with free standard shipping on orders exceeding $99.