The JBX93199 40-meter SC/ST duplex singlemode fiber patch cable represents a premium solution for demanding fiber optic network applications. Built to rigorous industry standards, this cable combines superior performance specifications with rugged construction for mission-critical installations. **Technical Excellence:** This singlemode patch cable features a 9/125 micron core with G.657.A1 grade glass fiber, delivering exceptional signal transmission characteristics. With insertion loss rated at ≤0.35dB (0.15dB typical) and return loss exceeding 20dB, the cable maintains signal integrity across both 1310nm and 1550nm wavelengths. Attenuation specifications of 0.25dB/km at 1310nm or 0.35dB/km at 1550nm ensure minimal signal degradation over the full 40-meter length, making it ideal for long-distance connections within data centers and campus networks. **Compliance & Reliability:** TAA compliant for government and federal procurement requirements, this cable meets RoHS/ELV directives ensuring environmentally responsible manufacturing. The OFNR (Optical Fiber, Non-conductive, Riser) jacket rating allows safe installation in vertical cable runs and plenum spaces. Testing per ANSI/TIA/EIA-455-171-A standards guarantees consistent performance and reliability. **Practical Features:** The bright orange jacket provides high visibility for quick identification during installation and maintenance. Type A to B crossover polarity is the most common duplex configuration, eliminating compatibility concerns. The 1.8mm outside diameter with plastic accessory components offers easy routing through tight spaces. Custom lengths are available for specific network requirements. **Applications:** Ideal for telecommunications facilities, data center interconnects, enterprise LANs, and any application requiring stable, high-bandwidth fiber connectivity. The 40-meter length bridges substantial distances while maintaining excellent signal quality. **Warranty & Support:** Backed by a 90-day limited warranty and available from multiple US locations (California, Texas, South Carolina) ensuring fast shipping. Free standard shipping on orders over $99 makes upgrading network infrastructure cost-effective.