I am having some trouble sorting out my modem....
My system is a Dell Latitude CJ 650 Laptop

The modem is a CardBus, Modem56, WinGlobal Xircom CBM56WG

I had hoped that enabling cardbus modem support would "just work"
but  I seem to have done something wrong ...

dmesg says...
com3 at cardbus1 dev 0 function 0: there are more than one possible base
com3: address for this device, please report the following information
com3: vendor 0x11c1 product 0x420
com3: base address 10 type mem size 100
com3: base address 14 type i/o size 8
com3: base address 18 type mem size 100

Could someone point me in the right direction ...