I've got some problems with my T8000 and my modem card. My system hang up when I'm too much on the net.
I use PCMCIA 3.1.2, i've got the same problem. I try the kernel 2.2.13pre15, and it's fine now...
Perhaps you must trying it. It's also work fine with PCMCIA 3.1.3.
My system is a toshiba T8000 P300 with bios 8.20 and Mandrake 6.1 with the PCMCIA 3.1.3 and kernel 2.2.13pre15.