The JBX42306 4m SC/APC to FC/UPC duplex singlemode fiber patch cable represents a professional-grade solution for connecting fiber optic network equipment with precision and reliability. This cable is specifically engineered for applications requiring high-performance signal transmission over short to medium distances. **Technical Excellence** Constructed with a 9/125 singlemode fiber core featuring G.657.A1 glass fiber specifications, this cable delivers superior optical performance. The SC/APC connector features an angled physical contact design that minimizes back reflection, while the FC/UPC connector provides alignment pin accuracy. Tested to ANSI/TIA/EIA-455-171-A-2001 standards, this cable achieves insertion loss of ≤0.35dB (0.15dB typical) and return loss ≥20dB. Attenuation ratings of 0.25 dB/km at 1310 nm and 0.35 dB/km at 1550 nm ensure signal integrity across telecommunications wavelengths. **Compliance and Standards** TAA compliant for U.S. government procurement and certified under RoHS Directive 2002/95/EC, making it ideal for regulated environments and federal projects. The riser-rated (OFNR) jacket meets building safety codes for installation in vertical cable runs and plenum spaces. **Practical Advantages** The distinctive yellow jacket provides visual identification in complex cable management systems. Available in custom lengths beyond the standard 4 meters, allowing flexibility for various installation scenarios. Duplex configuration with Type A to B crossover polarity accommodates bidirectional transmission in full-duplex communications. **Ideal Applications** Perfect for telecommunications infrastructure, data center networking, enterprise LAN connectivity, and fiber-to-the-premises (FTTP) installations. The compact 1.8mm outer diameter enables easy routing through existing conduit systems. **Warranty and Support** Backed by a comprehensive 90-day limited warranty and shipped from strategically located distribution centers (Danville CA, Fort Worth TX, Beaufort SC) with free standard shipping on orders over $99. Custom configurations are available to meet specific installation requirements.