The JBX88209 40-meter ST/ST duplex singlemode fiber patch cable represents a critical component for modern network infrastructure. This professionally engineered solution combines precision manufacturing with proven reliability for telecommunications, data centers, and enterprise network environments. Technical Excellence: Built with a 9/125 singlemode core and G.657.A1 glass fiber, this cable provides superior signal integrity across extended distances. The duplex configuration enables bidirectional communication within a single cable assembly. Rigorous attenuation testing per ANSI/TIA/EIA-455-171-A-2001 standards ensures consistent performance: 0.25 dB/km at 1310 nm and 0.35 dB/km at 1550 nm wavelengths. Typical insertion loss of 0.15dB (maximum 0.35dB) and return loss exceeding 20dB guarantee minimal signal degradation. Construction & Compliance: The OFNR-rated yellow jacket provides flame-resistant protection suitable for in-building use. TAA compliance makes this cable eligible for government contracts and regulated enterprise deployments. RoHS/ELV directives ensure environmental responsibility. ST/UPC connectors are factory-terminated in the standard Type A to B crossover polarity configuration used in most duplex installations. Applications: Ideal for connecting network equipment, telecommunications systems, fiber backbone networks, and specialized industrial applications requiring reliable long-distance signal transmission. The 40-meter length accommodates larger facility layouts without intermediate splicing. Custom Solutions: Custom lengths are available for specific installation requirements. Ships from multiple US locations (California, Texas, South Carolina) ensuring faster delivery. Backed by a 90-day limited warranty, with free standard shipping on orders exceeding $99. Whether upgrading existing infrastructure or deploying new networks, the JBX88209 delivers dependable, standards-compliant performance for mission-critical applications.