Re-installing a TouchTone keypad in an ASR-33

On Sat, May 16, 2009 at 6:20 PM, Dave Caroline <dave.thearchivist at gmail.com> wrote: The titles there look interesting, but I can't tell if any of the contents would apply specifically to the telephone circuits in the type of unit I have. If you do dig out the paper docs and have time to look over them, what I already have is the basic electrical and mechanical docs for a 20mA ASR-33, but nothing to do with the modem or telephone answer or dial circuits (one of the cool features of this unit, which I tested 25 years ago, was to plug it in but leave it off then to call it up from a computer (the ring would switch on the main TTY motor, etc), send text to it (at 110 baud, of course), and send a CTRL-D (EOT) which would shut it off again. AFAIK, this was standard for, say, TTYs at a news bureau, but it was fascinating to me in the early 1980s. -ethan