(Note: Yes, I know a 3B2 is not related at all to a 3B1! But I figure if you're interested in one, you're probably interested in the other.)
As late as 2002, at AT&T Easylink Services we were still using 3B2s to process email and email-to-fax on a private X.25 network; the beginnings of a 3B2 emulation-on-Sun-hardware project was in the works; I don't know if it ever went anywhere.
As late as 2002, at AT&T Easylink Services we were still using 3B2s to process email and email-to-fax on a private X.25 network; the beginnings of a 3B2 emulation-on-Sun-hardware project was in the works; I don't know if it ever went anywhere.
Some interesting documentation I wrote here: https://3e.org/private/gms/