The JBX88235 20m ST/ST Duplex Singlemode Fiber Patch Cable represents the pinnacle of fiber optic connectivity solutions for professionals demanding uncompromising performance. Built to exacting specifications, this cable delivers the reliable signal transmission required in mission-critical network environments. Key Performance Specifications: This duplex singlemode cable features a precisely engineered 9/125 micron core with G.657.A1 glass fiber composition, delivering ultra-low attenuation across both common operating wavelengths. At 1310nm, attenuation measures just 0.25 dB/km, while 1550nm performance reaches 0.35 dB/km—well within industry standards. The typical insertion loss of merely 0.15dB ensures minimal signal degradation over the full 20-meter length, while the ≥20dB return loss specification guarantees excellent signal reflection characteristics. Construction and Compliance: The 1.8mm outer diameter provides optimal flexibility without sacrificing durability, while the riser-rated (OFNR) PVC jacket ensures compliance with building safety codes (NFPA 79) and provides superior flame resistance. Every cable is manufactured in compliance with RoHS/ELV directives and TAA regulations, making it suitable for government and federal projects. End-to-End Reliability: The ST/UPC connectors utilize Type A to B crossover polarity—the industry standard for duplex patch cords. All cables undergo rigorous attenuation testing per ANSI/TIA/EIA-455-171-A standards before shipment. A 90-day limited warranty provides peace of mind for your network investment. Applications: Ideal for telecommunications rooms, data centers, fiber-to-the-desk deployments, and any application requiring robust duplex singlemode connectivity. The distinctive red jacket facilitates rapid cable identification in complex installations. Customization Available: While this product ships as a 20-meter cable, custom lengths are available upon request to perfectly match your specific installation requirements. Rapid fulfillment from three domestic distribution centers ensures quick delivery to your location. Order with confidence knowing you're investing in telecommunications-grade infrastructure backed by rigorous testing and compliance certifications.