3Com-USR has a number of different PCI modem models.  Most of them are
Winmodems (software modems) that won't work in linux unless you feel like
reverse-engineering their drivers.  I believe that this includes all of the
OEM models.

However, 3Com-USR also manufactures a PCI model 3CP5610 which is a hardware
modem that *will* work in linux natively.  It's the only PCI modem that
I've found to work in linux, although I'm sure there're more.

What you do to make it work...

find out the IRQ and I/O addresses (look in /proc/pci )
have a setserial command set up the serial port, i.e.:
/bin/setserial /dev/ttyS2 uart 16550A port 0xb800 irq 9
obviously you need to use the proper tty port and irq values (just pick an
unused tty)
And then, because you're using RedHat, and because most RedHat
configurations refer to /dev/modem as the modem rather than
/dev/ttyS[whatever], you need to:
ln -s /dev/ttyS2 /dev/modem

Then you should be able to talk to it (ati stuff) in minicom.

Lee Howard 

At 04:11 PM 7/17/00 -0400, you wrote:
>Has anyone tried setting up the USR 56K PCI Modem under Linux.  If so,
>does anyone have any directions or any information on how to do such a
>thing?  Any help would be appreciated.  Thanks
>
>Kevin
>



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