The JBX42576 ST/APC to FC/APC duplex singlemode fiber patch cable represents a reliable solution for professional fiber optic network installations. This 4-meter cable combines precision engineering with practical design, making it suitable for telecommunications facilities, data centers, enterprise networks, and ISP infrastructure. Technical Excellence: Built with 9/125 singlemode fiber core and G.657.A1 glass fiber specification, this cable ensures minimal signal degradation across network spans. The ST/APC (Straight Tip/Angled Physical Contact) to FC/APC (Ferrule Connector/Angled Physical Contact) configuration provides excellent connectivity with low back-reflection characteristics. Attenuation testing per ANSI/TIA/EIA-455-171-A-2001 standards confirms performance at 1310nm (0.25dB/km) and 1550nm (0.35dB/km) wavelengths, supporting both legacy and modern optical networks. Compliance & Safety: TAA compliant for government procurement and RoHS/ELV certified under EU directive 2002/95/EC, this cable meets the highest environmental and procurement standards. The OFNR riser-rated jacketing ensures fire safety in commercial building installations while providing mechanical protection against abrasion and environmental stress. Practical Design Features: The distinctive yellow jacket enhances visibility and cable management in complex installations. At 1.8mm outside diameter, the cable accommodates tight cable trays and confined routing scenarios. Type A to B crossover polarity configuration represents the most common duplex patch cord standard, eliminating compatibility concerns in typical installations. Applications: Ideal for connecting network switches, routers, and optical terminals in single-mode fiber networks. Suitable for backbone cabling, inter-cabinet connections, and telecommunications infrastructure upgrades. Customization Available: While this 4-meter version covers standard deployment distances, custom length options are available for specific installation requirements. Warranty & Support: Backed by a 90-day limited warranty and supported by multi-location U.S. fulfillment centers in Danville, CA; Fort Worth, TX; and Beaufort, SC, ensuring fast, reliable delivery.