The JBX43553 ST/APC to FC/UPC simplex singlemode fiber patch cable represents a reliable solution for professional network connectivity. This 12-meter cable combines precision engineering with regulatory compliance to meet the demands of modern telecommunications infrastructure. **Technical Specifications:** Featuring a 9/125 singlemode fiber core, this cable supports long-distance signal transmission with minimal attenuation. The insertion loss specification of ≤0.35dB (typical 0.15dB) ensures minimal signal degradation, while the return loss of ≥20dB guarantees excellent signal quality. Testing conducted per ANSI/TIA/EIA-455-171-A-2001 standards confirms performance at both 1310nm and 1550nm wavelengths, typical operating frequencies in telecommunications networks. **Design and Construction:** The cable features a 1.8mm outside diameter with durable plastic accessories and OFNR (Optical Fiber Non-conductive Riser) rated jacketing. The bright yellow color enhances visibility in crowded installations, reducing connection errors and simplifying maintenance. G.657.A1 glass fiber composition provides superior bend radius characteristics for flexible routing in tight spaces. **Compliance and Certification:** This cable meets stringent industry requirements including TAA (Trade Agreements Act) compliance, RoHS/ELV directives (EU 2002/95/EC), and U.S. manufacturing standards. Multiple sourcing from Danville CA, Fort Worth TX, and Beaufort SC ensures consistent availability. **Applications:** Ideal for telecommunications facilities, data centers, laboratory environments, and enterprise networks requiring reliable single-mode transmission. The straight-through polarity design simplifies installation and reduces configuration errors. **Custom Options:** Available in custom lengths to accommodate specific installation requirements. Backed by a 90-day limited warranty for added peace of mind.