The United States has banned import or sale of new communications equipment from China's Huawei Technologies and ZTE, citing national security threats. In a statement, the US Federal Communications Commission (FCC) on Friday said it had adopted the final rules, bar the sale or import of equipment made by Chinese firms Dahua Technology, Hangzhou Hikvision Digital Technology and Hytera Communications. "The new rules prohibit the authorization of equipment through the FCC's Certification process, and make clear that such equipment cannot be authorized under the Supplier's Declaration of Conformity process or be imported or marketed under rules that allow exemption from…