The JBX88226 4-meter ST/ST duplex singlemode fiber patch cable represents a reliable solution for modern fiber optic networking infrastructure. Constructed with precision-engineered 9/125 singlemode core and G.657.A1 grade glass fiber, this cable delivers exceptional optical performance suitable for long-distance telecommunications, data center interconnects, and enterprise network deployments. Key Performance Specifications: This cable achieves insertion loss of ≤0.35dB with typical performance of 0.15dB, ensuring minimal signal degradation across your network. Return loss exceeds 20dB, providing excellent signal reflection management. Attenuation performance meets stringent standards: 0.25 dB/km at 1310nm and 0.35 dB/km at 1550nm, tested in accordance with ANSI/TIA/EIA-455-171-A standards. Build Quality and Compliance: The duplex cable features a robust 1.8mm outside diameter with ST/UPC connectors on both ends, utilizing Type A to B crossover polarity—the most common configuration for duplex patch cords. The OFNR (Optical Fiber Non-conductive Riser) jacketing ensures fire safety compliance and suitability for plenum and riser installations. Both RoHS and ELV directives compliance guarantees environmental responsibility and hazardous substance restrictions adherence. Practical Applications: Ideal for telecommunications facilities, internet service providers, broadcast studios, medical imaging networks, and enterprise data centers. The distinctive red jacket enables quick visual identification in fiber-dense environments, reducing installation and troubleshooting time. Flexibility and Support: Available in custom lengths for specialized requirements beyond the standard 4m configuration. Ships from multiple U.S. locations (Danville CA, Fort Worth TX, Beaufort SC) with free standard shipping on orders exceeding $99. Protected by a 90-day limited warranty and backed by comprehensive testing documentation. TAA compliant for government and institutional procurement applications. Maintenance Tip: Keep connector ends clean and protected when not in use. Store in a cool, dry environment away from excessive heat or direct sunlight to maintain optimal performance longevity.