Not every US company already makes business with Huawei - so in that case they wouldn't have to stop selling/buying things, because they never started. E.g. is Microsoft, Apple or Amazon impacted?
>"There should be a wide list of companies to whom this applies now." //
I assumed the "this" was "the USA's trade blacklist". The blacklist applies to all companies AFAICT, though you are right it will probably only affect a small proportion.
Though any USA based company may have bought a Huawei phone, router, or similar, and presumably will not be allowed by law to do so henceforth?
Not sure how things like peering with a company that uses Huawei kit, or something, would work. How deep does it go? Can you buy phone service in countries where the phone supplier has Huawei base stations?
