In 2010, it was blocked from taking part in upgrading a U.S. phone carrier's network and last year was forced to unwind its acquisition of an American computer company after a security panel rejected the deal.
The U.S. House of Representatives intelligence committee said in November it would investigate whether allowing Chinese companies to expand in the United States might aid Chinese electronic spying.
It cited Huawei and rival ZTE Corp., another telecom equipment supplier, as being among the companies to be examined.
The panel said it will look into the role Chinese companies play in supplying components for U.S. telecoms systems and whether access to those systems might allow foreign governments to gather information.
McDonald reported from Beijing.
Huawei Technologies Ltd.: http://www.huawei.com
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