Shenzhen | Huawei, the Chinese technology powerhouse, is challenging the Federal Communications Commission in court for choking off its sales in the United States, the latest in the besieged company's widening efforts to hit back at regulators and critics across the globe.

The FCC voted last month to bar American telecommunications companies from using federal subsidies to buy equipment from Huawei and another Chinese supplier, ZTE. Washington considers both firms to be national security risks.