The JBX90202 55-meter SC/ST duplex singlemode fiber patch cable represents professional-grade connectivity infrastructure designed to meet the demanding requirements of modern data centers and telecommunications networks. This comprehensive solution combines superior optical performance with regulatory compliance and operational reliability. **Technical Specifications:** This duplex cable features dual 9/125 singlemode fibers with G.657.A1 glass fiber specifications, delivering exceptional signal integrity over extended distances. The cable demonstrates exceptional performance characteristics with insertion loss of ≤0.35dB (typical 0.15dB) and return loss exceeding 20dB, meeting stringent telecommunications standards. Attenuation performance is rated at 0.25 dB/km at 1310nm and 0.35 dB/km at 1550nm, ensuring optimal performance across common fiber optic wavelengths. **Connector Configuration:** The SC/UPC to ST/UPC connector pairing with Type A to B crossover polarity provides the most common configuration for duplex patch cord applications. This industry-standard setup ensures compatibility with existing network infrastructure while maintaining optimal signal transmission characteristics. **Safety and Compliance:** Fully TAA compliant and RoHS/ELV certified, this cable meets EU directive 2002/95/EC requirements. The riser-rated (OFNR) jacketing ensures fire safety compliance in plenum spaces and vertical cable runs, making it suitable for diverse building installations and regulatory environments. **Durability and Protection:** The 1.8mm outside diameter provides optimal balance between flexibility and protection, while the plastic accessories and robust construction ensure reliable performance in demanding network environments. Manufactured to precise specifications tested in accordance with ANSI/TIA/EIA-455-171-A-2001 standards. **Applications:** Ideal for telecommunications facilities, enterprise data centers, service provider networks, and mission-critical connectivity scenarios requiring proven reliability and performance. The 55-meter length accommodates substantial distance requirements between network equipment. **Warranty and Support:** Backed by a 90-day limited warranty, with convenient free standard shipping on orders exceeding $99 and strategic domestic warehousing for rapid delivery from multiple locations including Danville CA, Fort Worth TX, and Beaufort SC. **Customization Available:** Custom length options are available to accommodate specific network design requirements, providing flexibility beyond standard 55-meter configurations.