But the extension will also benefit some large American tech companies, like Google, that supply Huawei with certain components for its products. Those companies have also urged the administration to allow firms to continue doing business with Huawei.

The temporary reprieve did little to satisfy Huawei, which has protested its inclusion on a United States “entity list” that the administration has increasingly used to block Chinese tech companies.

“Extending the Temporary General License won’t have a substantial impact on Huawei’s business either way,” a Huawei spokesman said in a statement. “This decision does not change the fact that Huawei continues to be treated unfairly.”

The Chinese company has also been pushing back on the F.C.C. measure, which would make it impossible for wireless carriers to buy equipment from Huawei or ZTE, another Chinese telecom company, using federal subsidies meant to expand broadband access.

Huawei has criticized the F.C.C. over the proposal and called it “unlawful” in a filing at the agency this month. The F.C.C. rules could grow to cover other companies that are deemed national security threats, as well.

Ajit Pai, the agency’s chairman, has said the move is crucial as America and other countries build out the next generation of wireless networks, known as 5G. The Trump administration has waged a global campaign to prevent Huawei from building that network, arguing that the company poses a national security risk because of its ties to China and new laws that will give Beijing the power to spy on networks that companies like Huawei have helped build and maintain.

Huawei has disputed those allegations and said it did not and would not spy on behalf of the Chinese government.