The JBX42148 85-meter SC/APC to SC/UPC duplex single mode fiber patch cable is engineered for professional telecommunications infrastructure requiring extended reach and superior signal integrity. This cable represents an ideal solution for campus networks, long-distance interconnects, and telecommunications applications where performance and reliability cannot be compromised. **Technical Excellence:** Constructed with 9/125 G.657.A1 single mode fiber, this duplex cable delivers exceptional optical performance. The attenuation specifications of 0.25 dB/km at 1310 nm and 0.35 dB/km at 1550 nm ensure minimal signal degradation over the 85-meter distance. The insertion loss of ≤0.35dB (typical 0.15dB) and return loss of ≥20dB exceed industry expectations for patch cable applications. All measurements conform to ANSI/TIA/EIA-455-171-A-2001 standards, guaranteeing consistent quality and performance. **Robust Construction:** The 1.8mm outer diameter jacket provides excellent durability while maintaining flexibility for installation in conduits and cable trays. The riser-rated (OFNR) yellow PVC jacket offers flame resistance and is suitable for vertical runs in buildings. The Type A to B crossover polarity configuration is the industry standard for duplex patch cord applications, ensuring compatibility with virtually all network equipment. **Compliance & Standards:** Fully TAA compliant for government and institutional procurement. RoHS and ELV directive compliance ensures environmental responsibility without compromising performance. Available from multiple U.S. distribution centers in Danville, CA; Fort Worth, TX; and Beaufort, SC for rapid deployment. **Applications:** Ideal for telecommunications closets, backbone interconnects, campus network links, and disaster recovery systems where extended distances require single mode fiber performance. The duplex configuration supports bidirectional communication essential for modern networking protocols. **Warranty & Support:** 90-day limited warranty provides peace of mind. Custom lengths available upon request. Free standard shipping on orders exceeding $99 makes this professional-grade solution accessible and economical.