The JBX42526 ST/APC to ST/APC Duplex Singlemode Fiber Patch Cable is engineered for demanding telecommunications and data center applications requiring premium optical performance. This 25-meter cable features advanced 9/125 singlemode fiber with G.657.A1 glass composition, ensuring minimal signal loss and maximum transmission efficiency. **Key Performance Specifications:** This duplex cable delivers exceptional optical characteristics with insertion loss of ≤0.35dB at typical levels (0.15dB typ.) and return loss exceeding 20dB, meeting or exceeding ANSI/TIA/EIA standards. Attenuation rates of 0.25 dB/km at 1310nm and 0.35 dB/km at 1550nm enable reliable long-distance signal transmission. The 1.8mm outer diameter accommodates standard conduit and cable management systems. **Durability and Compliance:** Constructed with OFNR (Optical Fiber Non-conductive Riser) rated jacketing, this cable is approved for vertical runs in building risers without conduit. TAA compliant certification ensures procurement eligibility for government projects. RoHS/ELV compliance demonstrates environmental responsibility without compromising performance. **Practical Applications:** Ideal for connecting network switches, routers, and telecommunications equipment in enterprise environments, data centers, and telecommunication facilities. The crossover polarity (Type A to B) configuration is optimized for standard duplex patch cord deployments. Custom lengths are available for specialized installations. **Support and Warranty:** Backed by a 90-day limited warranty and shipped from strategically located U.S. warehouses (Danville CA, Fort Worth TX, or Beaufort SC) for rapid delivery. Free standard shipping applies to orders exceeding $99. Case packaging (10x10x10) facilitates bulk purchasing for network deployments.