The JBX42723 2-meter ST/APC to LC/UPC duplex singlemode fiber patch cable represents professional-grade optical connectivity engineered for mission-critical network applications. This high-performance cable bridges two of the most widely used fiber connector types in telecommunications infrastructure. **Technical Excellence:** Featuring a 9/125 singlemode fiber core with G.657.A1 specifications, this cable delivers superior performance characteristics. The insertion loss specification of ≤0.35dB (with typical performance at 0.15dB) ensures minimal signal degradation, while return loss of ≥20dB provides excellent signal integrity. Attenuation rates of 0.25 dB/km at 1310 nm or 0.35 dB/km at 1550 nm meet stringent telecommunications standards. **Compliance & Safety:** Fully TAA compliant for government procurement requirements. RoHS and ELV certified (EU directive 2002/95/EC), ensuring environmental and regulatory compliance. OFNR (Riser Rated) jacketing meets building code requirements for safe installation in vertical applications. **Design Features:** The distinctive yellow jacket provides easy identification in complex cable runs. The 1.8mm outside diameter balances flexibility with durability, facilitating installation in tight spaces while maintaining structural integrity. Type A to B crossover polarity configuration is the industry standard for duplex patch cord applications. **Applications:** Ideal for data centers, telecommunications infrastructure, enterprise networks, and professional audio/video transmission systems. The duplex configuration enables simultaneous bidirectional fiber communication, maximizing network efficiency. **Convenience & Support:** Available in custom lengths to suit specific installation requirements. Ships from multiple US locations (Danville CA, Fort Worth TX, Beaufort SC) with free standard shipping on orders exceeding $99. Comprehensive 90-day limited warranty provides peace of mind for enterprise deployments. Packaged in standard 10x10x10 case configuration for professional environments. **Standards Compliance:** Attenuation tested per ANSI/TIA/EIA-455-171-A-2001 standards, ensuring verified performance metrics. Manufactured in Taiwan, USA, or China with consistent quality specifications across all production facilities.