I keep meaning to get my old BBS going again, but got rid of the landlines last year so wouldn't be able to have dial-up anymore anyway. Kind of strange that landlines are so expensive these days when they used to be the least expensive option. Of course, I'm not sure the system would allow a 1200 baud connection. I don't remember if there was a minimum connection speed. I used to be able to dial-in with my Newton but I'm pretty sure the Newton modem was 2400 baud.
But, anyway, if it was Hayes Compatible, then it should be workable with most systems--at least if you can find ones still running. Hayes was, I think, the most popular brand back in the day.