Smart Link PC Modem Products
Conexant Systems acquired Smart Link's PC Modem chipset business in 2005. As a result of this acquisition, all Smart Link PC Modem products, including SL2800, SmartRISER series, SmartPCI series and SmartUSB series solutions have been transferred to Conexant. To obtain product support and updated modem drivers on any of these products, please contact Conexant through
www.conexant.com. (Linuxant).
http://www.smlink.com/smlink.asp
So, slmodem driver is not free any more.