Comment by aidenn0

I went from 2400 to 14.4; 9600 was the limit before trellis modulation, but IIRC it jumped from 14.4 to 33.6 rather quickly.

[edit]

After some quick googling, 33.6 wasn't standardized until 1996 (compare to 14.4 in 1991), but the manufacturers released modems ahead of the V.34 standard with DSPs so that they could be upgraded to the standard when it was available.

14.4 did catch on almost overnight in the early 90s though as the modems were no more expensive (and sometimes cheaper) than slower modems.