Huawei has filed a lawsuit against the US government over a ban that restricts government agencies from using its products.
It said the US failed to provide evidence to support the ban, and the firm also rejected claims it had links to the Chinese government.
The US has restricted the use of Huawei products over national security concerns.
It has also been lobbying allies to shun the Chinese telecoms firm.
Huawei is one of the world's largest telecommunications equipment and services providers.
The lawsuit is part of a wider push by the company in recent months challenging claims its products pose security risks.
"The US Congress has repeatedly failed to produce any evidence to support its restrictions on Huawei products. We are compelled to take this legal action as a proper and last resort," Huawei Rotating Chairman Guo Ping said.
"This ban not only is unlawful, but also restricts Huawei from engaging in fair competition, ultimately harming US consumers."
The company is challenging a US law that bans government agencies from buying Huawei's equipment and services.
The lawsuit, filed in a US federal court in Texas, argues the restrictions imposed by the US are "unconstitutional."
Huawei also rejected claims it had any links to the state, saying in a statement the firm was "not owned, controlled, or influenced" by the Chinese government.
Source: BBC
BDST: 1038 HRS, MAR 7, 2019
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