EUROPE would fall behind the United States and China in the race to install the next generation of wireless networks if governments ban Chinese equipment supplier Huawei Technologies Co. over security fears, according to an internal assessment by Deutsche Telekom AG.

Officials at Europe’s largest telecom company have warned that removing Huawei from the list of suppliers of fifth-generation (5G) networks would delay roll-out of the technology by at least two years, said sources familiar with a briefing paper written in recent weeks.

Germany and other European governments have been weighing whether to place restrictions on the use of Huawei equipment over security concerns, fears the company has dismissed. Chinese Foreign Minister Wang Yi used a European trip last week to warn against using fabricated excuses to target Huawei.

The Deutsche Telekom paper shows how nervous the industry has become that governments could throw its carefully-laid network expansion plans into chaos.

Huawei has become a leading supplier to European phone companies as they prepare to spend billions of euros on 5G to cope with surging data demand and support potentially lucrative applications such as self-driving cars, smart appliances and connected factories.

Deutsche Telekom has installed Huawei systems in thousands of its wireless towers. The supplier’s technology also forms the backbone of some of the German company’s cloud products.

In its internal assessment, Deutsche Telekom said 5G networks must be built on top of existing 4G infrastructure, which already relies extensively on Huawei gear. So, if Huawei is banned outright and companies are forced to rip out all of its equipment, that would cost the industry many billions of euros, the sources said.

Such a blanket, retroactive ban on using Huawei for 4G might be unlikely. Bans elsewhere in Australia and New Zealand, for example, have prohibited purchases of Huawei gear solely for 5G networks, which are viewed as harder to police as they process much of their data outside a central core.

Some telecom companies are already dialing back work with Huawei as the pressure on the company grows, throwing their cooperation into doubt.

Vodafone Group Plc said last week it is suspending some Huawei equipment purchases for the core of its networks in Europe. Deutsche Telekom said last month it’s re-evaluating its purchasing strategy — a first indication the German carrier may drop the Chinese company from its list of suppliers.

Other countries, including the United States, Australia and New Zealand, have blocked or limited the use of Huawei equipment in public infrastructure.

The United States has especially raised pressure on German policymakers, with a U.S. delegation dispatched to Berlin last month to make the case about risks posed by Huawei. Germany is weighing how to respond.

Dropping Huawei in Europe wouldn’t be easy. Most carriers have ordered its equipment because the technology is often seen as superior to that of its rivals. Competitors, including Ericsson AB, Nokia Oyj, Cisco Systems Inc. and Samsung Electronics Co., would have to step in if Huawei were to be banned, potentially leading to capacity constraints. (SD-Agencies)