Just to be clear, since the article isn't: the EO does not ban products from all foreign companies, only foreign companies who "poses an undue risk of sabotage to or subversion of the design, integrity, manufacturing, production, distribution, installation, operation, or maintenance of information and communications technology or services in the United States" (Direct quote from EO).

So Ericsson, Nokia, Samsung, etc. will not be affected.

Samsung is Korean, Alcatel-Lucent was French but now is part of Nokia. Nortel was acquired by Ericsson.

Cisco makes some backbone equipment. They were trying hard to sell a LTE "virtualized" core when I previously worked at $wireless_telco, but cisco does not make RAN components.

The only US based company I know of that is has licensed products in production use by a major telcom is Airspan [1]

[1] https://www.airspan.com/