The JBX42511 ST/APC to ST/APC duplex singlemode fiber patch cable represents a professional solution for connecting fiber optic network equipment in telecommunications, data centers, and enterprise environments. Engineered with precision-matched ST/APC connectors on both ends, this 1-meter cable eliminates the need for adapter hardware while reducing connection loss. **Technical Excellence:** Constructed with 9/125 singlemode fiber and G.657.A1 glass fiber, this duplex patch cable maintains exceptional optical performance across both 1310nm and 1550nm wavelengths. With typical insertion loss of just 0.15dB and maximum guaranteed attenuation of ≤0.35dB, the cable minimizes signal degradation over short runs. Return loss specifications of ≥20dB ensure reliable signal reflection characteristics, while testing conducted per ANSI/TIA/EIA-455-171-A-2001 standards guarantees consistent quality. **Professional Features:** The distinctive yellow jacket provides immediate visual identification in complex cable environments, facilitating faster troubleshooting and maintenance. The 1.8mm outside diameter allows flexibility in tight routing scenarios, while the OFNR riser rating permits installation in vertical cable runs without conduit, reducing installation complexity. **Compliance & Reliability:** TAA compliant for government procurement, RoHS/ELV certified for environmental standards, and manufactured in certified facilities (Taiwan, US, China), this cable meets the most demanding enterprise requirements. The 90-day limited warranty provides peace of mind for critical installations. **Versatility:** Custom lengths are available to accommodate specific installation requirements, eliminating excess cable waste and improving cable management aesthetics. The Type A to B crossover polarity ensures compatibility with standard duplex patch cord applications. Ideal for enterprises upgrading legacy fiber infrastructure, data centers expanding capacity, or telecommunications providers requiring consistent, high-performance connectivity solutions. Ships from multiple US locations for expedited delivery.