The JBX42137 30-meter SC/APC to SC/UPC duplex single-mode fiber patch cable represents a critical component in modern telecommunications infrastructure. Engineered to exacting standards, this cable combines performance, compliance, and reliability for professional networking environments. **Technical Excellence:** This duplex patch cable features a 9/125 single-mode fiber core with G.657.A1 specifications, delivering superior signal transmission across standard telecommunications wavelengths. The cable maintains exceptionally low insertion loss—typically just 0.15dB with a maximum of 0.35dB—ensuring minimal signal degradation over the 30-meter span. Return loss exceeds 20dB, providing excellent signal reflection characteristics critical for duplex operations. **Connector Configuration:** The SC/APC (angled) to SC/UPC (straight) connector pairing is configured in Type A to B crossover polarity, the industry-standard configuration for duplex patch cord applications. This arrangement enables simultaneous bidirectional transmission, making it ideal for telecommunications systems requiring full-duplex communication capabilities. **Compliance & Standards:** TAA compliance certification ensures this cable meets federal procurement requirements for government and institutional projects. RoHS/ELV compliance guarantees environmental responsibility. Independent testing validates all performance metrics against ANSI/TIA/EIA-455-171-A standards, assuring consistent quality across manufacturing batches. **Physical Specifications:** The yellow OFNR (riser-rated) jacket provides both durability and code compliance for building installations. At 1.8mm outside diameter, the cable maintains flexibility for routing while preserving structural integrity. Designed for standard 10x10x10 case packaging, it integrates seamlessly into professional inventory systems. **Applications:** Ideal for data centers, telecommunications facilities, backbone networks, and enterprise installations. Compatible with standard SC fiber patch panel systems. Supports both 1310nm and 1550nm wavelength operations typical in modern fiber optic networks. **Support & Warranty:** Backed by a 90-day limited warranty and available in custom lengths for specialized installations. Free standard shipping on orders exceeding $99, with distribution from multiple US locations ensuring rapid delivery.