The JBX42251 is a professional-grade 9-meter fiber optic patch cable engineered for demanding telecommunications and data center environments. This duplex singlemode cable seamlessly bridges LC/APC and ST/UPC fiber connectors, making it essential for network infrastructure requiring diverse connector types. Key Technical Specifications: The cable features a 9/125 singlemode core constructed from G.657.A1 glass fiber, meeting stringent telecommunications standards. Performance testing confirms insertion loss of ≤0.35dB at 0.15dB typical levels and return loss exceeding 20dB, ensuring minimal signal degradation across 1310nm and 1550nm wavelengths. Attenuation ratings of 0.25dB/km (1310nm) or 0.35dB/km (1550nm) provide predictable, long-distance signal transmission characteristics. Construction and Compliance: The 1.8mm outside diameter duplex jacket features riser-rated (OFNR) fire safety classification for installation in building plenums and risers. TAA compliance certifies the cable meets U.S. government procurement standards. RoHS/ELV directive compliance ensures environmental responsibility. The distinctive yellow jacket provides easy visual identification and inventory management. Type A to B Crossover Polarity: This cable implements the industry-standard crossover configuration for duplex patch cords, eliminating compatibility concerns when connecting equipment with different connector types. Applications and Benefits: Ideal for data center interconnects, telecommunications facilities, enterprise networks, and fiber-to-the-premises installations. The standardized construction and verified performance reduce installation risk and troubleshooting complexity. 90-day limited warranty provides confidence in deployment. Custom lengths available to match your specific installation requirements. Available nationwide with free standard shipping on orders exceeding $99, shipping from regional distribution centers in California, Texas, and South Carolina ensures rapid delivery.