I do find that description a bit odd, since all the early ITU specifications were made mostly by Europeean vendors, and were incompatible with the American vers

I do find that description a bit odd, since all the early ITU specifications were made mostly by Europeean vendors, and were incompatible with the American versions of protocols, etc. Anyway - a lot of these specs are made by the very researchers of the various vendors that you talk about - ITU is just a forum they use to collaborate.