The JBX42505 70-meter ST/APC to ST/UPC duplex singlemode fiber patch cable represents the pinnacle of fiber optic connectivity for professional networking environments. Engineered with precision, this cable delivers the performance, reliability, and compliance standards demanded by telecommunications providers, data centers, and enterprise networks. **Superior Specifications** This duplex cable features a 9/125 singlemode core utilizing G.657.A1 glass fiber technology, delivering exceptional light transmission characteristics. The ≤0.35dB insertion loss (0.15dB typical) and ≥20dB return loss ensure minimal signal degradation over the 70-meter span. Attenuation measurements meet or exceed ANSI/TIA/EIA standards at both 1310nm (0.25 dB/km) and 1550nm (0.35 dB/km) wavelengths, supporting diverse optical systems. **Robust Construction** The yellow OFNR riser-rated jacketing provides flame-resistant protection suitable for plenum and non-plenum installations. The 1.8mm outside diameter enables flexible routing through conduit and cable trays without compromising performance. Dual ST connectors—one APC (angled physical contact) and one UPC (ultra physical contact)—accommodate mixed-connector environments with Type A to B crossover polarity configuration. **Compliance & Certification** TAA compliant and manufactured in Taiwan, the US, or China, this cable meets EU Directive 2002/95/EC (RoHS/ELV) requirements. Its commodity classification as an optical accessory ensures proper handling and compatibility with standard telecommunications infrastructure. **Practical Advantages** Available in custom lengths for specialized applications, the JBX42505 eliminates excess cable waste and reduces installation complexity. Ships from multiple US locations (Danville CA, Fort Worth TX, Beaufort SC) with free standard shipping on orders exceeding $99. The 90-day limited warranty provides peace of mind for critical installations. **Ideal Applications** Perfect for campus interconnects, data center upgrades, telecommunications backbone networks, and any scenario requiring reliable singlemode fiber transmission. Whether upgrading legacy systems or deploying new infrastructure, this duplex cable delivers the performance standards your network demands.