Even before the arrest of its CFO last week, pressure from the United States had forced China's Huawei onto the back foot in markets from London to Tokyo.
"The US messaging is undoubtedly having an influence (in Europe)... if not directly then definitely because it has helped create a hostile environment," a Huawei executive told Reuters, adding that many in Huawei were "shell-shocked" by the arrest of the daughter and heir apparent of founder Ren Zhengfei.
Huawei and its lawyers have said it operates in strict compliance with applicable laws, and is confident that both the Canadian and US legal systems "will reach a just conclusion".
Washington's long campaign to convince the world that Huawei's ties to Beijing make the network equipment it sells to telecoms firms a security risk has already taken its toll.
Meng's arrest has raised concerns that European countries in particular could follow the United States, Australia and New Zealand in restricting Huawei's access to those markets.
Huawei, which has repeatedly denied accusations it facilitates Chinese espionage operations, did not immediately respond to a request for comment.
Of Huawei's 22 commercial contracts for next-generation 5G telecom networks, 14 are in Europe, where nearly every major carrier on the continent is a customer. In Britain alone, Huawei says it has spent GBP 1.3 billion ($1.65 billion) on investment and procurement over the last five years.
Europe, Middle East and Africa was Huawei's biggest region for sales outside China last year, its annual report says, accounting for CNY 164 billion, or 27 percent, of total sales.
Huawei says it employs more than 11,000 people in Europe, including 1,900 in research and development, and spends "billions of euros per year" in procurement from the region.
Until recently its position in Europe seemed secure, with governments resisting US pressure to block Huawei.
But there have been signs of a mood change, with some German government officials arguing that Huawei should be banned, Reuters reported last month. In Britain, a critical government agency report prompted Huawei to announce that it would spend $2 billion (roughly Rs. 14,400 crores) on a security overhaul.
Meanwhile, Japan's top telecom operators, including Softbank Group, are re-evaluating possible use of Huawei equipment for upcoming 5G networks, Kyodo News reported.
Huawei is already trying to assuage European fears, including the spending proposal to Britain's National Cyber Security Council, the company executive said. It has also opened a laboratory to enable source code reviews in Germany and has plans to open another in at least one other European country.
And on Monday, Huawei assured the Danish government's Defence Committee that its equipment was safe amid scrutiny of its role as a supplier to the nation's largest telecom carrier.
Sales ban fears
Risks for customers, as well as for Huawei, are heightened by the possibility that the sanctions investigation in the United States could lead to a ban on the purchase of US components. Such a ban nearly put ZTE Corp out of business before it was lifted.
At a summit for its vendor partners in early November, Huawei published a list of 92 "core suppliers." Of these, 33 were from the United States and include household names like Intel, Qualcomm, and Oracle, as well as lesser-known industry players like Seagate, Marvell, and Wind River.
Although Huawei has its own semiconductor division, making it somewhat less vulnerable than ZTE, even that operation depends on US design software.
"Many of the products sold to Huawei by American suppliers cannot be easily substituted with made-in-China alternatives," Stewart Randall, who tracks China's semiconductor industry at Shanghai-based consultancy Intralink, said.
The possibility of a ban on US companies supplying components and software further raises the risks for carriers relying on Huawei gear.
"In the worst case, if Huawei is found to have been involved, the United States will likely immediately impose an export ban on Huawei, forcing its business to come to a halt," brokerage Jefferies said in a report.
© Thomson Reuters 2018