The JBX42657 SC/APC to LC/UPC duplex singlemode fiber patch cable represents a premium solution for professional fiber optic network installations requiring long-distance connectivity and reliable signal transmission. **Technical Excellence:** Built with 9/125 singlemode fiber featuring G.657.A1 glass composition, this 80-meter cable delivers exceptional optical performance. The SC/APC connector features enhanced return loss characteristics (≥20dB), while the LC/UPC connector ensures standard compatibility. Measured insertion loss of ≤0.35dB and attenuation of 0.25 dB/km at 1310nm and 0.35 dB/km at 1550nm exceed industry standards, minimizing signal degradation over extended distances. **Superior Construction:** The 1.8mm outer diameter provides a streamlined profile for cable management, while the yellow OFNR (optical fiber non-conductive riser) jacket ensures building code compliance and flame resistance. This rating allows safe installation within vertical cable pathways and conduit systems. The duplex configuration with Type A to B crossover polarity supports standard bi-directional transmission. **Compliance & Reliability:** TAA (Trade Agreements Act) compliance certifies this cable for government contracts and regulated procurement. RoHS and ELV directives compliance ensures environmental responsibility. Manufactured to rigorous ANSI/TIA/EIA-455-171-A-2001 standards with comprehensive attenuation testing. **Practical Advantages:** Custom lengths are available for specific installation requirements. Free standard shipping on orders exceeding $99, with fulfillment from strategically positioned US warehouses (Danville CA, Fort Worth TX, Beaufort SC) ensures rapid delivery. The 90-day limited warranty provides peace of mind for critical network infrastructure. **Ideal Applications:** Perfect for campus interconnects, data center backbone cabling, carrier networks, and long-distance point-to-point links where signal integrity and regulatory compliance are paramount. The balanced performance characteristics make this cable suitable for both 1310nm and 1550nm wavelengths.