The JBX42742 ST/APC to LC/UPC fiber patch cable represents the pinnacle of optical connectivity solutions for enterprises and service providers demanding uncompromising performance. This 55-meter duplex configuration combines precision engineering with practical design to deliver reliable, high-speed signal transmission across diverse network environments. Technical Excellence: Built with 9/125 singlemode fiber core and G.657.A1 glass composition, this cable achieves exceptional optical performance with insertion loss of ≤0.35dB (typical 0.15dB) and return loss exceeding 20dB. Attenuation specifications of 0.25 dB/km at 1310 nm and 0.35 dB/km at 1550 nm ensure consistent performance across wavelength ranges. Independent testing per ANSI/TIA/EIA-455-171-A-2001 standards validates these specifications. Practical Features: The distinctive yellow OFNR-rated jacket provides excellent visibility in densely populated cable trays while meeting fire safety codes for riser installations. The 1.8mm outside diameter balances durability with space efficiency in tight conduit runs. ST/APC and LC/UPC connector combinations support Type A to B crossover polarity—the industry standard for duplex patch applications. Compliance & Reliability: TAA compliance certifies this cable for U.S. government and federally-funded projects. RoHS/ELV directives ensure environmental responsibility. The 90-day limited warranty provides purchase confidence, while domestic and international manufacturing options ensure availability. Applications: Ideal for data center interconnects, telecommunications backbone networks, enterprise campus networks, and broadcast facilities. The 55m length bridges significant distances while maintaining optical integrity for both transmit and receive channels. Customization: Custom length options accommodate specific installation requirements beyond standard configurations. Investment in quality fiber infrastructure ensures years of reliable network performance and future-proofs installations against increasing bandwidth demands.