US Robotics ISA 56 K Voice (internal) V90

I have a "US Robotics ISA 56 K Voice (internal) V90", but it does not work under Red Hat Linux 6.2.
¿How can I configure it?
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Is it a winmodem?  There is a very good chance that it will not work at all under linux.  Does it have jumpers?

See if you can find it on this list.  You may need to get some #s off of the card itself.  Or, if you have the box, look to see if it explicitly states that it has a UART.  If not, it is a winmodem.
The comments before are correct. Win-modems are not compatable with anything besides Windows9x. If your modem is a Sportster or a Courier you are in luck. These modems allow for both plug and play or manual IRQ settings as well as manual com port settings. Set your modem up manually on an unused IRQ and com port. You may have to disable one of the com ports on the motherboard so you do not have a conflict.

The next step is in linux. You will need to set a symbolic link between your modem and the com port. Com ports are listed as tty devices. Com1 is ttyS0 (case is important)

Once you are in Linux you can link your modem device to your comport by adding executing the following command.

ln -s dev/modem dev/ttyS0

This is called a symbolic link in Linux and instructs Linux on how to use your modem. Remember ttyS0 is for com1 and ttyS1 is for com2. The S is a capital letter.

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What sort of tests have you run to determine that the modem actually isn't working.

Have you tried minicom?

Have you used setserial to tell you information about your serial ports?

You can also use setserial to customize the serial port the modem is using, by changing the I/O and the IRQ used.  You could issue a command like this:

setserial /dev/ttyS2 irq 10 port 03e8

If it is networking you want, are networking capabilities compiled into the kernel or loaded as modules?  In fact, are serial capabilities compiled into the kernel (generally the answer to this is yes)?

Tell me what sort of information you are getting on your /dev/ttyS[0-9]  or /dev/cua[0-9] (found in older distributions) with setserial.  Modern motherboards often are configured to use higher number ports for the modem.

You can also do this to find out what Linux sees:

cat /proc/ioports
I just want to add this to the previous comment I made.  The best documentation you can read to answer your question , and which goes into more depth than can be covered by hundreds of comments is the Modem-HOWTO.

I highly recommend reading the Modem-HOWTO found either with your distribution (if HOWTOs are installed) or at a LDP site (here is one link):
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