The JBX88257 5-meter ST/ST duplex singlemode fiber patch cable represents professional-grade connectivity for demanding network environments. Constructed with precision-engineered 9/125 singlemode glass fiber (G.657.A1), this cable meets the rigorous requirements of modern data centers, telecommunications facilities, and enterprise networks. **Key Technical Features:** This duplex configuration delivers dual fiber strands for simultaneous bi-directional communication. The ST/UPC connectors provide superior optical performance with return loss ≥20dB and insertion loss as low as 0.15dB typical (≤0.35dB maximum). Tested at both 1310nm and 1550nm wavelengths with attenuation of 0.25dB/km and 0.35dB/km respectively, this cable excels in long-distance transmission applications. **Compliance & Standards:** TAA compliant certification makes this cable eligible for U.S. federal procurement, while RoHS/ELV compliance ensures environmental responsibility. The riser-rated (OFNR) jacket safely handles building plenum requirements without halogen emissions. All attenuation testing follows ANSI/TIA/EIA-455-171-A-2001 standards. **Practical Applications:** Ideal for connecting telecommunications equipment, network switches, and optical transmission systems. The Type A to B crossover polarity configuration is standard for most duplex patch cord applications, eliminating compatibility concerns. **Durability & Support:** Features a 1.8mm outer diameter for easy routing through conduit and cable trays. Backed by a comprehensive 90-day limited warranty. Available in custom lengths for specific installation requirements. Ships from multiple U.S. locations (CA, TX, SC) with free standard shipping on orders over $99. Whether upgrading legacy systems or building new fiber infrastructure, this TAA-compliant patch cable provides the reliability, performance, and compliance assurance enterprise networks demand.