Re: [Sheflug] Internal modem com port setting

[Rob Andrews <rob [at] xxxxxxxxxxxxx>]

[21-May-2004 15:12.41 (BST) / Chris Johnson]
 > How can I test to see what com port my internal PCI modem is set at in my
 > linux box?

Your dmesg output should have lines along the line of:

ttyS0 at 0x03f8 (irq = 4) is a 16550A
ttyS1 at 0x02f8 (irq = 3) is a 16550A

That's usually the onboard. With luck, providing you've not got a HCF modem,
ttyS2/3/4/n should appear with an IRQ that isn't 3 or 4 - more likely to be
9 or above.

If you have got a HCF modem, you'll need a kernel driver for it. If there
isn't a kernel driver for it, you may as well set fire to it.

 > Is there a /dev/ file I can send some text to trigger the modem to respond
 > or can I telnet to it or something like that?  How do I view the response?

As root (or a suitably privileged user that has rw access to the /dev/ttyS*
nodes), you can use 'cu' (for the UUCP-elite), or 'minicom' (if you're
feeling less inclined to use ~. to quit a terminal cilent), do something
along the lines of:

cu -l ttyS2 -s 115200

Wait for it to say:

Connected.

Then type 'ATI', follwed by <enter>.

If it echoes it back and responds, there's a modem on it.

If it doesn't echo back and you get no response, there's no modem on it.

Type ~. to quit cu.

HTH,
me.

-- 
nine                                <e> rob [at] impure.org.uk <pgp> 0x8bb5c71e
                  "This Basil. This Basil's hand. This smack on the head."
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