The JBX42531 ST/APC to ST/APC Duplex Singlemode Fiber Patch Cable represents professional-grade connectivity designed for telecommunications professionals, data center managers, and network infrastructure specialists. This 50-meter cable delivers the precision and reliability required for modern high-speed optical networks. **Technical Excellence** FeaturingG.657.A1 singlemode fiber with a 9/125 micron core diameter, this cable provides optimal performance across standard telecommunications wavelengths. The exceptionally low insertion loss of ≤0.35dB (typical 0.15dB) ensures minimal signal degradation over the 50-meter span. Return loss specifications of ≥20dB guarantee superior signal integrity, while attenuation ratings of 0.25 dB/km (1310 nm) and 0.35 dB/km (1550 nm) exceed industry standards. **Compliance and Certification** Full RoHS/ELV compliance and TAA certification make this cable suitable for government contracts, federal installations, and enterprise deployments with strict procurement standards. All testing adheres to ANSI/TIA/EIA-455-171-A-2001 standards, providing documented performance validation. **Practical Design Features** The bright yellow OFNR-rated jacket provides easy identification in cable trays and conduits while ensuring fire-safe installation in riser applications. The compact 1.8mm diameter minimizes installation challenges in congested equipment racks. ST/APC connectors with Type A to B crossover polarity represent the duplex standard for telecommunications applications. **Versatile Applications** Ideal for connecting telecommunications equipment, network switches, DWDM systems, and fiber optic test equipment. The 50-meter length accommodates moderate-distance runs typical in enterprise data centers, telecom facilities, and campus networks. **Value and Support** Ships from multiple U.S. locations (California, Texas, South Carolina) for rapid delivery. Free standard shipping applies to orders exceeding $99. Custom lengths are available for specialized installations. The 90-day limited warranty provides confidence in product reliability and performance durability for your critical network infrastructure.