Well, I had a U-Call modem interface for my Atari 800XL and a SmartTeam 1200 baud modem. I was thrilled when I learned that I could use Kermit to upload assignments to the Engineering main frame at university and not have to trudge through the snow to hand in a paper copy. That was cutting edge in the 80's.
The USR 56k that I have was the best 56k modem on the market and marked the pinnacle of dial-up. Not that I ever want to go back to those days.