The JBX42421 FC/APC to FC/UPC duplex singlemode fiber patch cable represents a premium solution for modern optical networking infrastructure. Engineered with precision connectors and high-quality G.657.A1 singlemode fiber, this 1-meter cable delivers exceptional signal integrity and reliability in demanding telecommunications and data center environments. Technical Excellence: This duplex patch cable features a 9/125 singlemode fiber core specifically optimized for long-distance, high-bandwidth applications. With an insertion loss of ≤0.35dB (typical 0.15dB) and return loss exceeding 20dB, it ensures minimal signal degradation across both 1310nm and 1550nm wavelengths. The attenuation specifications of 0.25 dB/km at 1310nm and 0.35 dB/km at 1550nm comply with industry standards for singlemode fiber transmission. Practical Design Features: The bright yellow OFNR-rated jacket provides superior fire safety ratings suitable for riser installations while enabling quick cable identification in complex network environments. The compact 1.8mm outside diameter allows flexible routing through cable management systems without occupying excessive space. The Type A to B crossover polarity configuration represents the most common duplex patch cord standard, minimizing compatibility concerns. Compliance and Quality Assurance: As a TAA-compliant product manufactured to RoHS and ELV directives (EU 2002/95/EC), this cable meets stringent environmental and procurement standards required by government and enterprise customers. All units undergo attenuation testing per ANSI/TIA/EIA-455-171-A-2001 specifications, ensuring consistent quality. Flexibility and Support: While this cable comes in a standard 1-meter length, custom lengths are available to accommodate specific installation requirements. The 90-day limited warranty provides peace of mind, and free standard shipping on orders exceeding $99 reduces total acquisition costs. Ships from strategically located warehouses in California, Texas, and South Carolina for expedited delivery. Applications: Perfect for telecommunications installations, fiber optic networks, enterprise data center connections, DWDM systems, and any application requiring singlemode fiber transmission with excellent optical performance and compliance certifications.