exta
extb
. exta
is the same as 19200;
extb
is the same as 38400. Many systems, including GNU/Linux,
support higher speeds. The stty command includes support
for speeds of
57600,
115200,
230400,
460800,
500000,
576000,
921600,
1000000,
1152000,
1500000,
2000000,
2500000,
3000000,
3500000,
or
4000000 where the system supports these.
0 hangs up the line if -clocal is set.