The JBX43516 ST/APC to ST/APC Simplex Singlemode Fiber Patch Cable represents a professional-grade solution for critical fiber optic networking applications. Engineered with precision manufacturing and rigorous testing standards, this 4-meter cable delivers the performance required by modern telecommunications infrastructure, data centers, and enterprise networks. **Superior Specifications:** Built on a 9/125 micron singlemode core with G.657.A1 glass fiber, the JBX43516 provides exceptional signal integrity. The cable achieves insertion loss of ≤0.35dB at typical operation (0.15dB Typ.), with return loss exceeding 20dB. These specifications are validated through rigorous attenuation testing in accordance with ANSI/TIA/EIA-455-171-A-2001 standards. At 1310 nm, attenuation measures 0.25 dB/km; at 1550 nm, 0.35 dB/km—both excellent for singlemode applications. **Robust Construction:** The 1.8mm outside diameter cable features riser-rated (OFNR) jacketing in bright yellow for easy identification and safety compliance in building installations. The straight-through polarity design ensures proper signal direction without complex reversals. **Compliance & Certifications:** Fully TAA-compliant and RoHS/ELV certified per EU directive 2002/95/EC, this cable meets government procurement requirements and environmental standards. It's manufactured to harmonization code 8544.70.0000 and backed by a 90-day limited warranty. **Practical Benefits:** Whether upgrading existing installations or deploying new networks, the JBX43516 offers reliable performance in telecommunications, broadcast, medical imaging, and data center environments. The simplex design allows for dedicated unidirectional communication or flexible duplex configurations with paired cables. **Availability & Support:** Available in custom lengths to match your specific requirements. Ships with free standard shipping on orders over $99 from multiple U.S. locations (Danville CA, Fort Worth TX, Beaufort SC), ensuring rapid delivery and minimal downtime.