Goto to http://linmodems.org/
and see if your modem is listed, you may also try searching google for "PCMCIA modem" + Linux
Anyways, let me tell 99% your modem is not going to work on Linux, reason you can find on Linmodems.org.
Btw. in case you are desperate for running the modem try out mandriva & Redhat H/w compatiblity list and see if your modem is listed.
>>im not sure what model the hardware is, but the laptop is a toshiba satellite
>>3000 X4.it uses kde
Then find it out from manufacturer(toshiba), it aint gonna help this way