The JBX42313 12-meter SC/APC to FC/UPC duplex singlemode fiber patch cable represents professional-grade connectivity for demanding telecommunications and data center environments. This precision-engineered cable combines advanced fiber optic technology with industry-standard connectors to deliver reliable, high-speed signal transmission. **Technical Specifications:** Constructed with 9/125 singlemode fiber featuring G.657.A1 glass composition, this cable operates at both 1310nm and 1550nm wavelengths with exceptional performance metrics. The SC/APC (angle-polished connector) to FC/UPC (ultra-polished connector) configuration provides optimal signal coupling with insertion loss of ≤0.35dB (typical 0.15dB) and return loss exceeding 20dB—critical parameters for long-distance, high-bandwidth applications. **Design & Build Quality:** The 1.8mm outside diameter jacketing in vibrant yellow enables quick visual identification in congested cable trays. The OFNR (Optical Fiber Non-conductive Riser) rating ensures compliance with building safety codes, while the duplex construction supports bidirectional communication over a single cable run. Type A to B crossover polarity represents the industry standard for duplex patch cords. **Compliance & Certifications:** Fully TAA (Trade Agreements Act) compliant for government and institutional procurement. RoHS/ELV directive compliance (EU 2002/95/EC) ensures environmental responsibility and safe handling. ANSI/TIA/EIA-455-171-A-2001 attenuation testing certifies performance reliability. **Applications:** Perfect for telecommunications closets, enterprise networks, fiber-to-the-home (FTTH) installations, and data center patch panel connections. The 12-meter length accommodates medium-distance runs while maintaining signal integrity. Custom lengths available for specialized installations. **Warranty & Support:** Backed by a 90-day limited warranty ensuring customer confidence. Ships from multiple US distribution centers (Danville CA, Fort Worth TX, Beaufort SC) with free standard shipping on orders exceeding $99. Manufactured in Taiwan, US, or China with consistent quality standards across all production facilities.