The JBX43126 4m SC/APC to SC/UPC Simplex Singlemode Fiber Patch Cable represents a premium solution for professional fiber optic network installations. Engineered with precision and built to exacting standards, this cable delivers the performance characteristics required by telecommunications professionals and network administrators. **Technical Excellence** Featuring a 9/125 singlemode fiber core with G.657.A1 specification, this cable supports both 1310nm and 1550nm wavelengths with minimal attenuation. The measured insertion loss of ≤0.35dB (0.15dB typical) and return loss of ≥20dB ensure signal integrity over extended distances. All attenuation testing conforms to ANSI/TIA/EIA-455-171-A-2001 standards, guaranteeing consistent performance across installations. **Compliance and Safety** Fully TAA compliant and RoHS/ELV certified per EU Directive 2002/95/EC, this cable meets critical government procurement requirements. The OFNR (Optical Fiber Non-conductive Riser) rated yellow jacket provides fire-rated protection suitable for building risers and inter-floor applications. **Practical Design Features** The bright yellow PVC jacket enhances visibility in dense network environments, simplifying identification and troubleshooting. The compact 1.8mm outside diameter allows flexible routing through cable trays and conduit. Standard straight-through polarity configuration ensures straightforward installation without specialized knowledge. **Flexibility and Support** While this product comes in a standard 4-meter length, custom lengths are available for specialized applications. Ships from multiple U.S. locations (Danville CA, Fort Worth TX, Beaufort SC) with free standard shipping on orders exceeding $99. Backed by a 90-day limited warranty and comprehensive product documentation. **Applications** Ideal for data center interconnects, long-distance telecommunications, enterprise LAN expansions, and fiber backbone networks where signal reliability and standards compliance are non-negotiable. The simplex configuration suits point-to-point transmission scenarios.