USRobotics modem RedHat

[Ricardo Verdugo]

Hi gurus,

I am new to Linux and am trying to make a PCI modem work in Red Hat.
I read that I need to find under windows what IRQ the modem is in along with
the UART and I/O numbers. I was only able to find the IQR that was 18.

I went to Linux as root, looked in /proc/pci but no device was under IRQ 18.
Even more when I tried
setserial /dev/ttyS3 irq 18 autoconfig
it dind't accept my parameters. I chose ttyS3 because in windows the modem
was in COM4 and I read that it corresponds to ttyS3 in linux. Since it
didn't accept 18 I used 5 because it was the only PCI device that looked
like
a modem. I passed through.
then I made the link,
rm -f /dev/modem
ln -s /dev/modem

Then I tried to dial with kppp, /sbin/ifup ppp0, and from Network devices in
the X-window but none work. They give the modem as activated, but never
dials up. If I run ifconfig I get some data for ppp0 meaning that it is
running, but it never dials up.......grgrgrggr

What can I do? I am totally lost. The modem is a USRobotics V.56kb fax
modem.

Thanks for your help.

Ricardo.

[Jean-David Beyer]

Ricardo Verdugo wrote:

> Hi gurus,
>
> I am new to Linux and am trying to make a PCI modem work in Red Hat.
> I read that I need to find under windows what IRQ the modem is in
> along with the UART and I/O numbers. I was only able to find the IQR
> that was 18.
>
> I went to Linux as root, looked in /proc/pci but no device was under
> IRQ 18. Even more when I tried setserial /dev/ttyS3 irq 18 autoconfig
> it dind't accept my parameters. I chose ttyS3 because in windows the
> modem was in COM4 and I read that it corresponds to ttyS3 in linux.
> Since it didn't accept 18 I used 5 because it was the only PCI device
> that looked like a modem. I passed through. then I made the link, rm
> -f /dev/modem ln -s /dev/modem
>
> Then I tried to dial with kppp, /sbin/ifup ppp0, and from Network
> devices in the X-window but none work. They give the modem as
> activated, but never dials up. If I run ifconfig I get some data for
> ppp0 meaning that it is running, but it never dials
> up.......grgrgrggr
>
> What can I do? I am totally lost. The modem is a USRobotics V.56kb
> fax modem.
>

Which USR PCI modem? Most PCI modems are the brain-damaged WinModems
that are a lot of trouble to make work, if you can make them work at all.

The only problem I have had with modems on Red Hat is that most of their
tools assume you have a link in /dev named /dev/modem that points to the
proper device, and yet they never make such a link. With the ISA modems,
I just stick one in to /dev/ttyS1 (on my machine). I.e.,

ln -s /dev/ttyS1 /dev/modem

First thing to do is to read the user documentation that comes with your
modem, if any. It should tell you how to configure the thing. Many
modems have jumpers to set device address and IRQ. At least the ISA ones
do. AFAIK, the PCI ones do not need that. How do PCI modems come up
anyway? They sure do not use an RS-232 connector.

I have a USR 5610B "56K* Performance Pro Modem" PCI modem that should
work with Linux, but the computer it goes in does not work yet (no
motherboard, no processors, no memory, little things like that), so I
cannot tell you first hand.

--
.~. Jean-David Beyer Registered Linux User 85642.
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