Phillip F Knaack wrote:

>As for speeds > 115.2k, do such animals exist in the RS-232 world?

I have several serial port cards in some 486 boxes that do 115200, 
230400 or 460800 Kb/s (SIIG CyberPro).  I had to hack the com driver 
to do 460Kb/s and I got a lot of fifo overflows at that speed. 
(Actually I get quite a few at 230 as well).  I haven't tried the 
higher speeds since Hanum reworked the driver ... I should do that 
sometime.

>I know there's RS-422 (twisted-pair) or whatever its called .. 

I have a pair of 422 line drivers that will do 115.2Kb/s for about
2500ft from BlackBox.  It's 1-pair (two wires) cat-1.  I had to jury 
rig a 9 volt additional power source onto one of the pins in the 
DB-25 to DB-9 converter (yuck!!! but, if you need that 2500ft serial
console to work ... well it's just the thing).

Paul