High-altitude optical cable quota item

High-altitude or specialized fiber optic cables, including HEMP-protected or aerospace-grade optical cables, are generally classified under HTSUS 8517.62.0050, with a general duty rate of Free.OverviewHigh-altitude optical cables are specialized fiber optic cables designed for extreme environments, such as aerospace applications or military networks requiring HEMP (High-Altitude Electromagnetic Pulse) protection. These cables are engineered to maintain signal integrity, high bandwidth, and reliability under conditions of electromagnetic interference, low temperatures, and high altitudes . They are often used in survivable communications networks, such as the Colorado Springs network connecting Cheyenne Mountain Air Force Station, Peterson AFB, and Schriever AFB, where path diversity, site dispersal, and nuclear effects hardness are critical .Customs and Tariff ClassificationFor import and quota purposes, high-altitude optical cables, particularly Active Optical Cable (AOC) assemblies, are classified under the Harmonized Tariff Schedule of the United States (HTSUS) subheading 8517.62.0050. This classification covers:Fiber optic cables with transceivers on each end that convert electrical signals to optical signals and back.Assemblies designed for telecommunication and data communication applications, including high-performance computing and network clusters.Cables typically ranging from 2 to 100 meters in length, supporting high-speed transmissions up to 10 Gbps per channel . The general rate of duty for this HTSUS item is Free, meaning no import tariff is applied under standard conditions. Importers should provide the customs ruling number with entry documents to ensure proper classification.Key ConsiderationsSpecialized Applications: High-altitude optical cables may include HEMP protection or aerospace-grade specifications, which do not change the HTSUS classification but may require compliance with military or aerospace standards .Documentation: Importers should reference the customs ruling (e.g., NY N238122) when filing to ensure correct duty treatment .Quota Implications: While the duty is Free, certain high-tech or military-grade optical cables may be subject to export controls or licensing requirements under U.S. law. In summary, high-altitude optical cables, including HEMP-protected or aerospace-grade fiber optic assemblies, are classified under HTSUS 8517.62.0050 with a duty-free rate, but importers must ensure compliance with applicable technical standards and regulatory requirements.