The JBX43246 4-meter LC/APC to ST/UPC simplex singlemode fiber patch cable represents a premium solution for telecommunications and data center professionals requiring certified, compliant optical connectivity. This meticulously engineered cable bridges disparate fiber connector types while maintaining the highest signal fidelity standards. **Technical Specifications & Performance** Built on a 9/125 singlemode fiber core with G.657.A1 glass composition, this cable delivers predictable performance across both common telecom wavelengths. At 1310nm, attenuation measures 0.25 dB/km, while 1550nm operation maintains 0.35 dB/km performance. The measured insertion loss of ≤0.35dB (with typical performance at 0.15dB) ensures minimal signal degradation. Return loss specifications exceeding 20dB guarantee clean signal reflection characteristics essential for sensitive applications. **Connector Technology** The LC/APC to ST/UPC configuration accommodates mixed legacy and modern infrastructure environments. LC/APC connectors feature angled polished surfaces reducing back-reflection, while ST/UPC connectors provide robust mechanical interfaces proven across decades of telecommunications deployment. The straight-through polarity configuration eliminates cross-over complexity. **Physical Design & Installation** At just 1.8mm outside diameter, the compact profile navigates congested cable management environments efficiently. The yellow OFNR (Riser Rated) PVC jacket provides flame resistance suitable for plenum-adjacent installations while offering superior visibility in high-density patch panels. The 4-meter length balances reach requirements with manageability—readily available in custom lengths for specialized deployments. **Compliance & Quality Assurance** TAA compliance certification demonstrates adherence to Trade Agreements Act requirements, essential for government and federally-funded projects. RoHS/ELV certification ensures environmental responsibility. Attenuation testing conforms to ANSI/TIA/EIA-455-171-A-2001 standards, verifying performance through independent validation. **Applications & Use Cases** Ideal for data center interconnects, telecommunications facilities, fiber-to-the-desk (FTTD) implementations, and network equipment patching. Suitable for connecting optical transceivers, multiplexers, and optical distribution frames where mixed connector types exist. **Warranty & Support** Backed by a 90-day limited warranty with prompt replacement options. Ships from multiple US locations (California, Texas, South Carolina) ensuring expedited delivery. Free standard shipping available on qualifying orders.