The JBX88378 6m ST/ST Duplex Singlemode Fiber Patch Cable represents professional-grade fiber optic connectivity designed for demanding network environments. This cable combines cutting-edge fiber technology with reliable connector performance to ensure seamless signal transmission. **Technical Specifications:** Built with a 9/125 singlemode core using G.657.A1 glass fiber, this duplex patch cable delivers superior light transmission with minimal signal degradation. The cable achieves insertion loss of ≤0.35dB (0.15dB typical) and return loss ≥20dB, exceeding industry standards for performance. Attenuation ratings of 0.25 dB/km at 1310nm and 0.35 dB/km at 1550nm ensure optimal performance across the full spectrum. **Design & Construction:** The ST/UPC to ST/UPC connectors feature Type A to B crossover polarity configuration, the most common standard for duplex patch cords. The 1.8mm outside diameter provides excellent flexibility for routing through cable trays, conduits, and tight spaces. The OFNR (Optical Fiber, Non-conductive, Riser) rated jacket meets fire safety codes for installation in vertical building shafts and between floors. **Compliance & Standards:** Fully TAA compliant and RoHS/ELV certified per EU directive 2002/95/EC, this cable meets government procurement requirements and environmental standards. All attenuation performance is tested in accordance with ANSI/TIA/EIA-455-171-A-2001 standards. **Applications:** Ideal for telecommunications networks, data centers, server interconnects, laboratory testing, and any application requiring reliable singlemode fiber connectivity. The distinctive purple jacket facilitates color-coded network organization. **Flexibility & Support:** While this product is available in the standard 6-meter length, custom lengths are available to meet specific installation requirements. The 90-day limited warranty provides peace of mind, and free standard shipping on orders over $99 offers exceptional value. Ships from multiple U.S. locations for fast delivery.