> Vadic had a variant 1200 baud system that wasn't compatible with 212, too, > as I recall.
Yup, they did. Can't remember the model number, but I used one of these to dial-in to work way back then with a Tektronix 4010 DVST graphics terminal. Having 1200 baud that worked really well over phone lines at a time when most people with home computers were getting by with 110 or at most 300 baud we great. But, it only worked at 1200 baud connecting to work. Connecting to BBS's and such maxed out at 300 baud. At least it was backwards compatible that way. If I remember correctly, it was about 12 inches deep, about 2 inches tall, and perhaps 8 inches wide, and the front panel had a bunch of LEDs that indicated all of the normal RS232 signaling lines (CD, CTS, DSR, RTS, DTR, RX and TX) along with a few that showed the speed (110, 300, or 1200) that it was operating at. The "screech" it made when connecting up at 1200 baud was very unique sounding. Much more harsh than 103 FSK signaling, but nothing nearly as complex as the training that went on when modems started getting up to 9600 baud. I remember having my first Telebit Trailblazer 9600 baud modem. Reliable 9600 baud over voice-grade POTS lines. They were very remarkable devices for their time. I used it on my home Unix system way back when for UUCP connections (for email and USENET) to a number of local UUCP hubs. The training tones for it were pretty crazy sounding, very unique. I feel old. -Rick
