The JBX42538 ST/APC to ST/APC Duplex Singlemode Fiber Patch Cable represents professional-grade connectivity for demanding network environments. Spanning 85 meters, this cable bridges significant distances while maintaining exceptional signal integrity across your network infrastructure. **Technical Excellence** Built with 9/125 singlemode fiber cores and premium G.657.A1 glass, this duplex cable delivers attenuation rates of 0.25 dB/km at 1310nm or 0.35 dB/km at 1550nm, meeting ANSI/TIA/EIA-455-171-A-2001 testing standards. The insertion loss specification of ≤0.35dB (typical 0.15dB) ensures minimal signal degradation, while return loss ≥20dB provides excellent signal quality. These performance characteristics make it ideal for long-span connections in backbone networks and telecommunications applications. **Compliance & Safety** TAA compliant for federal procurement requirements, this cable also meets RoHS/ELV directive 2002/95/EC standards. The OFNR riser rating allows installation in plenum and riser spaces, meeting all major building codes for fire safety and smoke generation. **Practical Design Features** The distinctive yellow jacket enhances cable identification and visibility in complex installations. The compact 1.8mm outer diameter facilitates dense cable routing without unnecessary bulk. Duplex configuration with Type A to B crossover polarity accommodates standard network topologies, eliminating the need for additional adapters. **Flexibility & Support** Available in custom lengths beyond the standard 85m offering, this cable accommodates unique installation requirements. Manufactured in Taiwan, the United States, and China, it ships free from multiple US locations (Danville CA, Fort Worth TX, Beaufort SC) on orders exceeding $99. **Ideal Applications** Perfect for data center interconnections, long-distance backbone networks, telecommunications facilities, enterprise campus networks, and any installation requiring reliable singlemode fiber connectivity. The 90-day limited warranty provides confidence in your network investment.