The JBX85211 SC/ST duplex singlemode fiber patch cable represents professional-grade connectivity engineered for mission-critical network infrastructure. This 85-meter cable delivers exceptional performance characteristics that exceed industry standards, making it ideal for telecommunications professionals, data center operators, and IT infrastructure managers. **Key Performance Features:** With a 9/125 singlemode core and G.657.A1 glass fiber specification, this cable provides superior light transmission efficiency. The insertion loss of ≤0.35dB (0.15dB typical) and return loss of ≥20dB ensure minimal signal degradation over the 85-meter span. Attenuation specifications of 0.25 dB/km at 1310 nm or 0.35 dB/km at 1550 nm meet or exceed ANSI/TIA/EIA-455-171-A-2001 testing standards. **Connector Configuration:** The SC/UPC to ST/UPC connector pairing with Type A to B crossover polarity provides broad compatibility with existing network infrastructure while optimizing signal integrity. Both connector types feature UPC (Ultra Physical Contact) polish for superior performance. **Safety & Compliance:** This cable meets TAA (Trade Agreements Act) compliance requirements, making it suitable for government and public sector projects. RoHS and ELV directive compliance ensures environmental responsibility. The OFNR Riser rating provides critical fire safety compliance for installations in building plenum spaces and vertical cable runs. **Construction Quality:** The yellow 1.8mm diameter OFNR-rated jacket provides excellent visibility and durability during installation while maintaining fire-safety ratings. Professional packaging in 10x10x10 cases facilitates bulk deployment. **Flexibility & Support:** Custom length options accommodate specific installation requirements beyond the standard 85-meter configuration. The 90-day limited warranty provides purchase confidence. Ships quickly from multiple U.S. locations (Danville CA, Fort Worth TX, Beaufort SC) with free standard shipping on orders exceeding $99. **Applications:** Ideal for data center backbone connections, telecommunications networks, long-distance fiber runs, network upgrades, and enterprise-level installations requiring reliable singlemode performance.