Post by Justin Ha » Sat, 05 Apr 1997 04:00:00

: Hello everybody,

: The terminal speeds supported by termios are, inter alia, 4800, 9600,
: 19200. Now many modems support speeds like 7200, 12000 and 14400.  But
: the terminal device can't be set to that speed.  If the modem to modem
: connect speed is, say, 14400 then what is the actual speed of the
: terminal? Can they be different? Why is it that termios do not have
: entries for bauds 7200, 12000 and 14400?

This is a DCE vs. DTE matter. The speed of your modem connection need not
equal the speed of the computer talking to the modem. With error correction
this of course makes immense sense, as the computer can feed the modem data
faster than it send/receives, as it compresses it. Read any standard FAQ on
modems. This isn't even a Linux thing, DOS/Windoze do this too. (Try settting
Telix or Telemate to 14400, it won't do it usually). There are better
explanations. For them, RTFM.

- justin
"...they say you were something in those formative years, hold on to
nothing as fast as you can, well still pretty good year..."
-Tori Amos, "Pretty Good Year"

finger me for my public key (currently broken)


1. terminal speeds faster than 9600

I'm using SCO UNIX 4.2 with 10 terminals and 5 printers hooked to my system witha Digi C/X system.  Is there a problem with setting my terminals to operate at a
speed of 38400?  I did and they seem to work fine. I just changed the setings ininittab and changed the configuration on my Wyse 50 terminals to 38400.  But I was looking through the SCO system administrators guide and in the performance
management section it says if you are going to operate at speeds higher than
9600 you must change the value of the TTHOG kernel parameter and the value of
the NCLIST kernel parameter.  Is this something I should do?

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