I had ISDN in Southeast Michigan (bit north of Mt. Clemens) back in the late 90s and it was amazing. Being local, your stoy really caught my ear. I wonder about that timing, though, because 56K modems weren't available in '92. They didn't get to be a thing that people could buy until '97 or so, IIRC.
(I worked retail computer support at the time, and USRobotics did a neat sales presentation at Henry Ford Manor where, if we went to an "educational" session about the technology, we got a free modem. I already had ISDN by that time so I didn't really need it, but it was still neat. And a couple-hundred-dollar modem, for free, for a retail employee seemed like quite a perk.)
(I worked retail computer support at the time, and USRobotics did a neat sales presentation at Henry Ford Manor where, if we went to an "educational" session about the technology, we got a free modem. I already had ISDN by that time so I didn't really need it, but it was still neat. And a couple-hundred-dollar modem, for free, for a retail employee seemed like quite a perk.)