Date: Thu, 12 Oct 2000 13:12:34 +0200 (CEST) From: Micke Josefsson <mj@isy.liu.se> To: freebsd-questions@freebsd.org Subject: Dial-in and auto-baud question. Message-ID: <XFMail.001012131234.mj@isy.liu.se>
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I have made it possible to dial-in to my computer via a modem. The entries in
/etc/gettytab works and selects the correct speed after each ENTER I press on
the sending machine.
But how is it that it only autobauds between 57600, 38400, 19200 and 9600 bauds?
I have added 28800 and 26400 baud entries in /etc/gettytab (see below), but when
i press ENTER, after calling and 'CONNECT', the receiving computer always shuts
down communication when I reach one of them.
I have tried finding a place in the source that defines the first mentioned
speeds as allowed but not the latter ones - I have found no such place.
Is it impossible for me to get a connection at 28800, which is what my modems
muster?
I have similar modems at each end. Both can go up to 28800 to ISP's so they are
not dodgy.
...................................
In gettytab that works:
[snip]
2|std.9600|9600-baud:\
:np:sp#9600:
g|std.19200|19200-baud:\
:np:sp#19200:
std.38400|38400-baud:\
:np:sp#38400:
std.57600|57600-baud:\
:np:sp#57600:
std.115200|115200-baud:\
:np:sp#115200:
std.230400|230400-baud:\
:np:sp#230400:
# my additions per the handbook
vp|VH9600:\
:nx=VH57600:tc=9600-baud:
vq|VH19200:\
:nx=VH9600:tc=19200-baud:
vr|VH38400:\
:nx=VH19200:tc=38400-baud:
vs|VH57600:\
:nx=VH38400:tc=57600-baud:
[SNIP]
..........................................
...and in one that does not work:
[snip]
2|std.9600|9600-baud:\
:np:sp#9600:
g|std.19200|19200-baud:\
:np:sp#19200:
std.28800|28800-baud:\
:np:sp#28800:
std.38400|38400-baud:\
:np:sp#38400:
std.57600|57600-baud:\
:np:sp#57600:
std.115200|115200-baud:\
:np:sp#115200:
std.230400|230400-baud:\
:np:sp#230400:
# my own
vp|VH9600:\
:nx=VH57600:tc=9600-baud:
vq|VH19200:\
:nx=VH9600:tc=19200-baud:
vn|VH28800:\
:nx=VH19200:tc=28800-baud:
vr|VH38400:\
:nx=VH28800:tc=38400-baud:
vs|VH57600:\
:nx=VH38400:tc=57600-baud:
[snip]
.................................
Getty is started from /etc/ttys as:
ttyd1 "/usr/libexec/getty VH57600" dialup on
and appears as:
2322 ?? I 0:00.01 /usr/libexec/getty VH57600 ttyd1
when 'ps ax'
I have also noted that 'stty -f /dev/ttyd1 57600' works but not when using 28800
for example. What are the standard speeds? How fine-grained are they?
Eager for comments!
/Micke
----------------------------------
Michael Josefsson, MSEE
mj@isy.liu.se
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