Msg: 1474 *Conference*
02-04-92 09:21:46
From: DREW BLANCHAR
To : RICK LOPES
Subj: REPLY TO MSG #1435 (M102 AS TDD)
Rick, This is something I started exploring back in 1986 when I first found the world of TDD's necessary. Problems: 1. TDDs run at 55 baud (maybe 150 ? for newer models but 55 for the majority) domestic and 57 international. (Don't jump on me if I got the 57 wrong, as I don't have my notes handy). 2. TDDs run at 5 bits. Hey, we're talking UPPER CASE only. Actually, they use an in-band bit to switch to the 2nd 32 characters at each machine. (Like if I type [, we'll use A-Z and some punctuation, until I type ], then we'll use the same 5-bit code to send numbers and other characters, until I type [ again. Like control-S and control-Q for in-band start/stop.. In the bit-stream band rather than hard wire control. Got it?) 3. For us reading on a MDL 100, it sound great, and it is. More somebody ready what we're sending without a hard copy print, we may be typing too fast. Down at DCARA, one of the fellows has a program for his IBM clone that let's him have a TDD window. I just don't know if we can fool the MDL 100 into working at those speeds and changing the ascII character-to-bits coding to Bardot coding. Besides, now that pocket-portable TDDs are under $150, with a 2-line 40-character LCD screen, I'm not sure which way to go? (Were I ever? ;) -dB