Lot of people have been looking for the modem with the Conexant(=Rockwell) RS56/SP PCI Chipset. This one works for the 6793-11 and 6795-12 model numbers. The driver is for the Aztech MSP 3880SP-W 56K. At Aztech.com.sg are more drivers for Conexant/Rockwell chipsets. Each modem has the used chipset written in in it's description.