The JBX42658 SC/APC to LC/UPC 85-meter duplex singlemode fiber patch cable represents professional-grade connectivity for mission-critical fiber optic networks. This meticulously engineered cable combines superior optical performance with robust construction to deliver reliable signal transmission over substantial distances. **Key Technical Specifications:** This cable features a 9/125 singlemode core with G.657.A1 glass fiber, specifically designed for long-distance telecommunications applications. With a tested insertion loss of ≤0.35dB at 0.15dB typical and return loss exceeding 20dB, it exceeds industry standards for low-attenuation performance. The cable operates at both 1310nm and 1550nm wavelengths, with attenuation rates of 0.25dB/km and 0.35dB/km respectively, making it suitable for diverse network architectures. **Durability and Compliance:** Constructed with OFNR (Optical Fiber, Non-conductive, Riser Rated) jacketing, this cable meets building safety codes and is certified RoHS/ELV and TAA compliant. The 1.8mm outside diameter provides flexibility without sacrificing durability, while the yellow jacket offers high visibility in installations. Manufacturing locations span Taiwan, the United States, and China, ensuring consistent quality. **Applications and Use Cases:** Ideal for enterprise data centers, telecommunications infrastructure, long-distance campus networks, and government installations. The Type A to B crossover polarity configuration ensures compatibility with most duplex patch cord requirements. The 85-meter length eliminates the need for splicing in many applications, reducing signal degradation. **Value Proposition:** With free standard shipping on orders exceeding $99 and a 90-day limited warranty, this cable offers exceptional reliability at competitive pricing. Custom lengths are available for specialized installations. Ships from multiple U.S. locations (Danville CA, Fort Worth TX, Beaufort SC) for faster delivery. **Maintenance and Performance:** Regularly inspect connectors for contamination and store in dry conditions to maintain optimal performance. The cable's construction ensures consistent performance throughout its operational life, backed by rigorous ANSI/TIA/EIA-455-171-A-2001 attenuation testing.