Echoing commands to modem

[fred f]

I am attempting to echo commands to a modem on /dev/ttyS4. for some reason I cant seem to get a responce. Modem is on 4, and is functional. If I use minicom, it works fine.
according ot linux for dummies, the technique works for discovering modem ports, but examples only were 0-3, but it did indicate that modems could be on 4-9 also

perhaps ports above 3 need someting special done first???

fwiw, I am trying to have cron call my cellphone as a reminder.

thanx
fred

[Whipping Boy]

cat > /dev/ttyS4

You'll get a blank line; just type in what you want to send to the modem and hit enter and it'll get sent; then you'll get another blank line and type in the next command, etc., etc. Just do Ctrl-C or Ctrl-Z when done

[Strike]

You could have problems with your flow settings. I don't know how you'd set it on the terminal, just that you'd use the stuff in termios.h in a C program to set it.

[fred f]

cat > /dev/ttyS4 You'll get a blank line; just type in what you want to send to the modem
Whipping Boy -- tried that, also cp "file" /dev/ttyS4, and a bunch of other stuff.

=================

You could have problems with your flow settings. I don't know how you'd set it on the terminal, just that you'd use the stuff in termios.h in a C program to set it.

Strike -- I assume that sets speed, parity, bits stop bits, etc??? Kind of what I have been wondering

thanx guys
fred

[Strike]

Originally posted by fred f:
<STRONG>Strike -- I assume that sets speed, parity, bits stop bits, etc??? Kind of what I have been wondering</STRONG>

Yeah, I just don't know of a command that does this stuff - just how to do it in C.

[Stuka]

Ironically enough, Strike, the command is stty - just looked through Google and found it. Seems like the options even look a lot like the termios constants!

fred f - try man stty. You should get something that looks like this (http://www.mcsr.olemiss.edu/cgi-bin/man-cgi?stty).

[fred f]

Stuka
You got it! thanks a bunch.
the bug was -clocal says that you have a modem that uses modem controls, and apparently anything that looks like a modem control string gets stripped. clocal says the modem DOESN'T use modem controls. go figure

if anybody cares:
register S7 Sets the number of seconds the modem waits for a carrier. 25 seconds seems to be enought time to dial, ring and by then the voicemail is ready to pick up

stty --file=/dev/ttyS4 sane clocal
echo ATS7=25DT5551234 &gt; /dev/ttyS4


&gt;&gt; the command is stty - just looked &gt;&gt; through Google and found it.