> unknown vendor 0x134d product 0x7890 (miscellaneous
> communications, revision 0x01) at pci0 dev 19 function 0
> not configured

If it is not a winmodem, you might just have to add the vendor and product
numbers to pcidevs (it's in /usr/src/sys/dev/pci).  Then you can build the
.c and .h files using "make -f Makefile.pcidevs".  I think you'll also have
to add it to pucdata.c in the same directory, and then add the probe for
"puc" and "com at puc" in the kernel config.  Compile a new kernel and try
it out ;o)

Hope this helps!  Mike.