The Chinese telecoms firm Huawei has told the BBC it does not represent a threat to American national security.
The United States House Intelligence Committee said in October that Huawei and ZTE, also based in China, could be a long-term threat and were too close to the ruling Communist party.
But Huawei insist they are not a threat just because they are from China.
In a new interview, board member Chen Li Fang told the BBC that it "totally understands" concerns about security, but added it would not be "fair" only because "a company originates in a particular country".
So far Huawei has been welcomed in the UK - but that could change.
In September Huawei's founder, Ren Zhengfei, visited the UK and announced a £1.3 billion investment in its UK division - leading Prime Minister David Cameron to declare the UK "open for business".
But the BBC also reported that Sir Malcolm Rifkind, who chairs the Intelligence and Security Committee, was looking into the risks involved in working closely with the company.
The aim, he told the BBC, is to find a "working level of trust".
Recently Channel 4's dispatches uncovered the scale of lobbying of UK MPs and officials by Huawei, including an alleged £12,000 visit to its research facility in China for one MP and his wife.