The JBX42527 ST/APC to ST/APC Duplex Singlemode Fiber Patch Cable represents professional-grade connectivity for demanding fiber optic networks. This 30-meter cable combines superior performance with practical design features that network administrators and installers demand. **Superior Performance Specifications:** With a 9/125 singlemode core and G.657.A1 glass fiber, this patch cable meets rigorous industry standards for long-distance transmission. The measured insertion loss of ≤0.35dB (0.15dB typical) ensures minimal signal degradation, while return loss of ≥20dB provides excellent signal reflection control. Attenuation rates of 0.25 dB/km at 1310 nm and 0.35 dB/km at 1550 nm make this cable ideal for both traditional and modern wavelength divisions. **Design and Compliance:** The distinctive yellow jacket simplifies cable identification and management in multi-cable environments. OFNR riser-rated jacketing ensures compliance with building safety codes, while the compact 1.8mm outside diameter allows easy routing through conduit and tight spaces. TAA compliance and RoHS/ELV certification meet government procurement requirements. **Practical Features:** The duplex configuration with Type A to B crossover polarity provides standard connectivity for most fiber installations. Custom lengths are available for unique project requirements. Ships quickly from multiple U.S. locations with free standard shipping on orders exceeding $99. **Applications:** Ideal for data centers, telecommunications infrastructure, campus networks, and enterprise backbone installations. Perfect for organizations requiring TAA-compliant components. The ST/APC connectors offer reliable keyed connections with minimal back-reflection. **Quality Assurance:** Each cable is attenuation-tested according to ANSI/TIA/EIA-455-171-A-2001 standards. Backed by a 90-day limited warranty, this professional-grade cable provides confidence in your network infrastructure.