The JBX43546 ST/APC to FC/UPC simplex singlemode fiber patch cable represents a premium solution for professional fiber optic networking installations. This 4-meter cable combines superior optical performance with practical design features that professionals demand. **Performance Specifications:** Built with 9/125 singlemode fiber and G.657.A1 glass composition, this cable delivers exceptional signal transmission capabilities. The ST/APC (straight tip angle polished) to FC/UPC (fixed connector ultra-polished) connector combination provides optimal coupling efficiency. Testing confirms insertion loss of ≤0.35dB (typical 0.15dB) and return loss ≥20dB, meeting stringent industry standards. Attenuation specifications of 0.25dB/km at 1310nm and 0.35dB/km at 1550nm enable long-distance data transmission with minimal signal degradation. **Design & Construction:** The distinctive yellow outer jacket enhances cable identification in complex network environments, reducing installation errors and simplifying maintenance. The 1.8mm outside diameter and riser-rated OFNR jacketing provide durability while meeting building code requirements for indoor installations. Straight-through polarity ensures seamless integration with existing network infrastructure. **Compliance & Certification:** TAA (Trade Agreements Act) compliance makes this cable eligible for government contracts and procurement programs. RoHS/ELV directive compliance ensures environmental responsibility. Manufactured to ANSI/TIA/EIA-455-171-A standards, quality is assured throughout the cable's lifecycle. **Applications:** Ideally suited for telecommunications facilities, data centers, server rooms, and enterprise network installations where singlemode fiber transmission is required. The simplex configuration makes it perfect for unidirectional signal transmission applications. **Availability & Support:** Offered in 4-meter standard length with custom length availability for specialized installations. Backed by a 90-day limited warranty. Free standard shipping on qualifying orders from strategically located distribution centers ensures fast delivery. Professional-grade quality at competitive pricing makes this cable an excellent choice for network engineers and IT professionals.