The JBX42583 12-meter ST/APC to FC/APC duplex singlemode fiber patch cable represents a professional-grade solution for mission-critical network infrastructure. Engineered to exacting telecommunications standards, this cable delivers exceptional performance for organizations requiring reliable fiber-optic signal transmission over extended distances. **Technical Specifications:** This duplex patch cable features a precision 9/125 singlemode core compatible with CWDM, DWDM, and single-channel implementations. The G.657.A1 glass fiber specification ensures optimal performance characteristics, with attenuation rates of 0.25 dB/km at 1310 nm or 0.35 dB/km at 1550 nm—ideal for both C-band and L-band applications. Insertion loss is exceptionally low at ≤0.35dB (0.15dB typical), while return loss exceeds 20dB, ensuring signal integrity and minimal reflection losses. **Construction & Durability:** The 1.8mm outside diameter allows flexible routing through cable trays and conduits without excessive bending losses. The yellow OFNR-rated riser jacket provides flame resistance for in-building installations while offering excellent visibility for network administration. RoHS/ELV compliance ensures environmental responsibility, and manufacturing is certified to ANSI/TIA/EIA-455-171-A standards. **Application Benefits:** Type A to B crossover polarity provides the most common duplex configuration for direct equipment connection without additional adapters. The 12-meter length is ideal for rack-to-rack connections, patch panel applications, and short-to-medium distance runs in data centers. **Compliance & Availability:** Fully TAA compliant for government and institutional procurement. Available in custom lengths for unique application requirements. Ships from multiple U.S. locations (Danville CA, Fort Worth TX, Beaufort SC) with free standard shipping on orders exceeding $99. Backed by a 90-day limited warranty. **Perfect For:** Telecommunications providers, data center operators, enterprise IT infrastructure, network service providers, and compliance-conscious organizations requiring government-certified components.