The JBX42483 2-meter ST/APC to ST/UPC duplex singlemode fiber patch cable represents professional-grade infrastructure connectivity for mission-critical applications. Each cable is engineered with precision-manufactured singlemode fiber featuring a 9/125 micron core specification, establishing the industry standard for long-distance, high-bandwidth signal transmission in telecommunications networks. **Superior Performance Characteristics:** This duplex configuration delivers exceptional optical performance with typical insertion loss of 0.15dB and maximum insertion loss of 0.35dB at 1310nm wavelength. Return loss specifications exceed 20dB, ensuring minimal signal reflection and optimal signal integrity. The cable meets stringent ANSI/TIA/EIA-455-171-A standards, verified through comprehensive attenuation testing protocols. **Connector Configuration:** The ST/APC to ST/UPC connector arrangement employs Type A to B crossover polarity, the most prevalent configuration for duplex patch cord applications. APC (Angled Physical Contact) and UPC (Ultra Physical Contact) connectors provide different return loss characteristics, making this configuration ideal for diverse network topologies and equipment compatibility. **Build Quality & Compliance:** Constructed with G.657.A1 glass fiber and OFNR riser-rated jacketing, this cable meets stringent safety and performance standards for indoor commercial installations. The 1.8mm outside diameter enables flexible routing without compromising durability or signal quality. TAA compliance ensures government procurement eligibility, while RoHS/ELV directive adherence guarantees environmental responsibility and hazardous substance restrictions. **Practical Applications:** Ideal for data center interconnects, telecommunications infrastructure, local area network (LAN) installations, and fiber-to-the-desk deployments. The 2-meter length provides optimal reach for equipment bay connections, patch panel installations, and structured cabling systems. Custom lengths available to accommodate specific installation requirements. **Warranty & Support:** Backed by a comprehensive 90-day limited warranty, with convenient 2-day shipping from multiple U.S. distribution centers (Danville CA, Fort Worth TX, Beaufort SC). Free standard shipping on orders exceeding $99 makes bulk purchasing economical for enterprise deployments.