The JBX42109 50-meter LC/APC to SC/APC duplex single mode fiber patch cable represents professional-grade connectivity designed for demanding telecommunications, data center, and enterprise network environments. This high-performance optical accessory combines precision engineering with rigorous quality standards to deliver exceptional reliability and signal integrity. **Technical Specifications & Performance:** Constructed with 9/125 single mode fiber featuring G.657.A1 glass composition, this cable delivers outstanding optical performance. The low insertion loss specification of ≤0.35dB (0.15dB typical) at both 1310nm and 1550nm wavelengths ensures minimal signal degradation over the full 50-meter length. With return loss exceeding 20dB, the APC connector terminations provide excellent signal reflection control, critical for maintaining network performance in high-density environments. **Connector Technology:** The LC/APC to SC/APC connector pairing with Type A to B crossover configuration represents the industry standard for duplex patch cord applications. APC (Angled Physical Contact) connectors minimize back-reflection, making them essential for single mode long-distance transmissions and sensitive optical systems. **Durability & Compliance:** Featuring OFNR (Optical Fiber Non-conductive Riser) rated jacketing with 1.8mm outside diameter, this cable meets fire safety codes for in-building installations. The yellow color coding aids in network identification and organization. Full TAA compliance and RoHS/ELV certification ensure this product meets rigorous government procurement standards and environmental regulations. **Applications:** Ideal for telecommunications carrier networks, data center interconnections, campus backbone installations, and DWDM systems. The custom length availability accommodates specialized deployment requirements beyond the standard 50-meter configuration. **Quality Assurance:** Attenuation testing complies with ANSI/TIA/EIA-455-171-A-2001 standards. The 90-day limited warranty provides confidence in product reliability. Manufactured in Taiwan, US, or China with consistent quality across all production facilities, this cable ships from strategically located US warehouses (Danville CA, Fort Worth TX, or Beaufort SC) with free standard shipping on orders exceeding $99.