The JBX88219 90-meter ST/ST duplex singlemode fiber patch cable represents professional-grade networking infrastructure designed for demanding applications requiring superior signal fidelity and long-distance transmission capabilities. **Technical Excellence:** Built with a 9/125 micron singlemode core and premium G.657.A1 glass fiber, this cable achieves industry-leading performance metrics. Insertion loss is ≤0.35dB (typically 0.15dB), with return loss exceeding 20dB. Attenuation measures just 0.25 dB/km at 1310 nm or 0.35 dB/km at 1550 nm, meeting rigorous ANSI/TIA/EIA-455-171-A-2001 standards. **Connector Configuration:** Duplex ST/UPC connectors in Type A to B crossover configuration enable seamless integration with standard telecommunications equipment. The precise UPC polishing ensures minimal signal loss and maximum connection reliability. **Compliance & Safety:** Fully TAA compliant and RoHS/ELV directive certified, this cable meets government procurement standards. The OFNR (Riser Rated) yellow jacket provides fire-rated protection suitable for in-building vertical runs and horizontal installations. **Ideal Applications:** - Long-distance telecommunications networks - Data center connectivity - Enterprise backbone infrastructure - Campus network installations - Carrier-grade installations - Government and military networks **Quality Assurance:** Every cable undergoes attenuation testing per ANSI standards and includes a 90-day limited warranty. Ships from multiple US locations (Danville CA, Fort Worth TX, Beaufort SC) with free standard shipping on orders exceeding $99. **Custom Solutions Available:** Required non-standard lengths? Custom configurations are available to match your specific infrastructure requirements. Choose the JBX88219 for enterprise-grade fiber connectivity that delivers consistent performance in the most demanding network environments.