There were a number of requests for a LUCENT 1643 Modem Driver. The driver I have uploaded is the correct driver for the LUNENT 1643 but it is not ctaloged anywhere as such. I had it listed as a "SMART K56flex PnP FaxMdm/LT1643" on my sales invoice. To make it work, you have to copy it to your C-Drive. Then select Start - Run - and click on the file which is "56s95330". Select and click on the Icon with the open box and contents showing and it will give you a prompt to install. Hit OK and it will go! Let me know if I have won anything!