Inbetwixt the 1200 and 2400 baud periods, does anyone
remember the
Racal-Vadic protocol? ISTR, it was something like 1800 baud, using a
3450(?) modem. I had a couple of those back then; just wired them into
the telco line without a DAA. When you called someone with another
Racal modem, the difference in speed from 1200 was quite obvious.
I don't recall an 1800 baud one on dialup. They had four-wire leased
line modems that did 1800.
Seems like the Vadic 1200 baud dialup ones, which had different tone
sets from 212A, actually ran slightly faster than 1200.
De