The JBX42599 90-meter ST/APC to FC/APC duplex singlemode fiber patch cable represents professional-grade connectivity for demanding telecommunications, data center, and enterprise networking environments. This cable is engineered to deliver reliable, high-speed signal transmission over extended distances with minimal signal degradation. **Technical Specifications:** Built on 9/125 singlemode fiber technology, this cable provides single-wavelength transmission ideal for long-distance, point-to-point connections. The G.657.A1 glass fiber specification ensures compatibility with modern telecommunications infrastructure while supporting improved bend radius characteristics. Attenuation performance of 0.25 dB/km at 1310nm or 0.35 dB/km at 1550nm ensures signal integrity across the 90-meter length, with typical insertion loss of just 0.15dB and maximum return loss at ≥20dB. **Design & Construction:** The cable features ST/APC and FC/APC connectors in Type A to B crossover polarity—the industry standard for duplex patch cord applications. The yellow OFNR (Optical Fiber Non-conductive Riser) rated jacket provides fire safety classification for indoor installations while offering superior durability. At 1.8mm outside diameter, the cable maintains flexibility for installation in crowded cable trays and equipment racks. **Compliance & Standards:** Full TAA compliance ensures suitability for U.S. government and institutional procurement. RoHS/ELV directive compliance meets EU environmental standards. Attenuation testing follows ANSI/TIA/EIA-455-171-A-2001 standards, guaranteeing measurement consistency and reliability. **Applications:** Ideal for connecting telecommunications equipment, data center infrastructure, campus networks, and carrier-grade networking systems. The extended 90-meter length accommodates inter-building connections and large facility installations where intermediate splicing would compromise signal quality. **Custom Solutions:** Custom cable lengths are available to perfectly match your installation specifications. Domestic manufacturing options (Taiwan, US, China) ensure quality control and supply chain reliability. The 90-day limited warranty provides peace of mind for mission-critical installations.