Yet another stupid question


 When you want to test whether /dev/dsp is properly configured you just 
"cat somewave > /dev/dsp"

 Now what do I do if I want to test a /dev/ttyS(0-3). I tried to cat 
AT and read if there is an OK answer, but it doesn't seem to work this 

 Even though this is not strictly gnome related, I am writing this for 
gnome. And no wvdial won't do because it tries to configure everything 
while all I need is to test the "comm port" for an OK.


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