The JBX42426 FC/APC to FC/UPC duplex singlemode fiber patch cable represents a superior solution for telecommunications, data center, and enterprise network infrastructure. This 4-meter cable combines precision engineering with practical design features to meet the demands of modern high-speed fiber optic installations. Technical Excellence: Built with G.657.A1 singlemode glass fiber and a 9/125 micron core, this cable delivers exceptional optical performance. Attenuation rates of 0.25 dB/km at 1310 nm and 0.35 dB/km at 1550 nm ensure minimal signal loss over distance. The insertion loss specification of ≤0.35dB (typical 0.15dB) and return loss ≥20dB exceed standard requirements, making this cable suitable for long-distance, high-bandwidth applications including DWDM systems. Connector Configuration: The FC/APC to FC/UPC duplex configuration provides a Type A to B crossover polarity setup, the industry standard for duplex patch cords. This arrangement supports simultaneous two-way signal transmission, essential for modern communication protocols. Both connector types ensure secure mating and optimal signal integrity. Practical Design Features: The distinctive yellow outer jacket facilitates quick cable identification in complex installations, reducing configuration errors and maintenance time. The 1.8mm outside diameter provides flexibility without compromising durability, while the riser-rated (OFNR) jacketing ensures fire safety and compliance with building codes for vertical cable runs. Compliance & Certification: Fully TAA-compliant and certified under EU directive 2002/95/EC (RoHS/ELV), this cable meets government procurement standards. Testing performed to ANSI/TIA/EIA-455-171-A-2001 guarantees quality and performance reliability. Versatility & Availability: Available in custom lengths for specialized installations beyond the standard 4m configuration. Ships from multiple US locations (Danville CA, Fort Worth TX, Beaufort SC) with free standard shipping on qualifying orders. The 90-day limited warranty provides additional peace of mind. Ideal Applications: Data center interconnects, telecommunications networks, CATV headends, DWDM systems, and any installation requiring reliable singlemode fiber transmission over medium distances.