The JBX42503 ST/APC to ST/UPC duplex singlemode fiber patch cable represents a professional solution for organizations requiring reliable, high-performance fiber connectivity over extended distances. This 60-meter cable delivers the precision and reliability demanded by modern network infrastructure. **Technical Excellence** Built with 9/125 singlemode fiber and G.657.A1 glass, this cable achieves exceptional optical performance. The APC (Angled Physical Contact) to UPC (Ultra Physical Contact) connector configuration minimizes reflections and signal degradation. With insertion loss of just ≤0.35dB typical (0.15dB) and return loss exceeding 20dB, it ensures clean signal transmission across demanding applications. The cable performs optimally at both 1310nm and 1550nm wavelengths, with attenuation of 0.25 dB/km at 1310nm and 0.35 dB/km at 1550nm. **Durability and Compliance** The yellow OFNR-rated (fire-rated) jacket protects the fiber core while providing visibility in complex cable environments. Manufactured to ANSI/TIA/EIA-455-171-A standards, every cable undergoes rigorous attenuation testing. RoHS and EU directive 2002/95/EC compliance ensures environmental responsibility. TAA compliance makes this cable suitable for government and sensitive installations. **Practical Advantages** The compact 1.8mm outside diameter enables easy routing through tight spaces and cable trays. Type A to B crossover polarity is the industry standard for duplex patch cords, ensuring compatibility with existing infrastructure. Available in custom lengths for specific deployment requirements. **Applications** Ideal for data centers, telecommunications facilities, campus networks, and any installation requiring single-mode fiber connectivity. The 60-meter length suits backbone connections and inter-building links. **Support and Warranty** Backed by a 90-day limited warranty and free standard shipping on orders over $99. Ships from multiple US locations for quick delivery.