VANCOUVER (BLOOMBERG) - Huawei Technologies Co used code names and secret subsidiaries to conduct business in Syria, Sudan and Iran, the United States alleged in the extradition case related to sanctions violations against the company's chief financial officer.

The Chinese networking giant allegedly operated a de facto unit called DirectPoint in Sudan and Canicula in Syria, according to documents released this week by a Canadian court.

In internal spreadsheets, Huawei also used the code "A5" to refer to Sudan and "A7" to Syria, the US said in the documents submitted to the Canadian government in support of its request for the extradition of company CFO Meng Wanzhou.

Huawei operated those units just as it controlled a subsidiary in Iran that obtained American goods, technologies and services in violation of US sanctions, according to the allegations.

The US is seeking to extradite Ms Meng - daughter of Huawei's billionaire founder Ren Zhengfei - after accusing her and others at the company of conspiring to trick banks into conducting more than US$100 million (S$138 million) worth of transactions that may have violated US sanctions.

The company has denied it committed any violations. It didn't respond on Wednesday (Aug 21) to requests for comment on the allegations in the court documents.

"The motivation for these misrepresentations stemmed from Huawei's need to move money out of countries that are subject to US or EU sanctions - such as Iran, Syria, or Sudan - through the international banking system," the Justice Department said in its request for Canada to arrest Ms Meng as she arrived at Vancouver's airport last December.

The court on Tuesday released hundreds of pages of documents and video footage submitted by Ms Meng's defence to back its arguments that Canadian authorities deceived her about the true nature of her detention in order to collect evidence for the FBI.

In those documents, the US outlined its case against Ms Meng and its plans for witnesses in the case against her if she is successfully extradited.

Among those witness are unnamed executives from HSBC Holdings, Standard Chartered, BNP Paribas SA and Citigroup that allegedly were misled by Ms Meng and her colleagues into continuing business with Huawei at the time despite the risk of sanctions violations.