Driver for Inspirion 8600 PCI modem

I replaced the hard drive on my Inspirion 8600, and downloaded all of the missing drivers, except 1.  I'm missing the driver for the PCI modem.  On the download driver website, 3 different modems are listed (Broadcom V.92 MDC, Conexant D480 MDC V.92 modem, and TrueMobile 5100 GPRS PC Card).  My Computer doesn't list the type on my machine, nor does the Service Tag listing.  Can anyone tell me how to find out which one I need, or at least the differences between these three?  I assume I don't need this modem and that the machine works OK without it (wireless).  I just want to have things up to date.

Hi,

 

Have a look at the modem and see what brand it is. Underneath there should be a lable that will say what is fitted.

 

                                                                     Regards Chris