The JBX42308 SC/APC to FC/UPC duplex singlemode fiber patch cable is engineered to meet the demanding requirements of modern telecommunications infrastructure. This 6-meter cable combines precision engineering with cost-effective performance, making it an ideal choice for data centers, network installations, enterprise communications systems, and telecommunications facilities. **Key Technical Features:** This cable utilizes 9/125 singlemode fiber construction with G.657.A1 specifications, providing superior performance characteristics. The SC/APC connector features a physical contact angle design, while the FC/UPC connector offers universal polarity compatibility. The duplex configuration with Type A to B crossover polarity represents the industry standard for patch cord applications, simplifying installation and reducing compatibility issues. **Performance Specifications:** With measured insertion loss of ≤0.35dB (typical 0.15dB) and return loss ≥20dB, this cable minimizes signal degradation across telecommunications wavelengths (1310nm and 1550nm). Attenuation rates of 0.25dB/km at 1310nm and 0.35dB/km at 1550nm ensure efficient long-distance signal transmission. All performance testing adheres to ANSI/TIA/EIA-455-171-A-2001 standards, guaranteeing reliability and consistency. **Build Quality & Compliance:** The distinctive yellow OFNR (Optical Fiber Non-conductive Riser) rated jacket provides excellent durability while meeting fire safety codes for building installations. With 1.8mm outside diameter, the cable integrates easily into existing conduit and management systems. TAA compliance ensures eligibility for government and enterprise procurement programs, while RoHS/ELV directive adherence confirms environmental responsibility. **Flexibility & Support:** Custom lengths are available for specialized installations, and the cable ships free on orders exceeding $99 from strategically located distribution centers (Danville, CA; Fort Worth, TX; Beaufort, SC). The 90-day limited warranty provides peace of mind on your network infrastructure investment. Professional technical specifications and rigorous quality testing make this patch cable suitable for mission-critical telecommunications applications where reliability is paramount.