hi Bjorn, These modules seem to be pretty standardized. I exchanged two different makes by Askey Inc. and it worked well. those modules have a wire i/f to the telephone plug via some chokes & stuff while that plug in the foreground goes to the AC'97 modem controller. This stuff sells at 8 EURO at ebay. So a laptop user who does not like his windows softmodem (Agere or PCTel or whatever) can exchange the module, provided he has access to a driver too. The 2 wire plug seems to be standardized too. greetinx F 2009/12/26, Bjorn Wielens <Uniacke1@xxxxxxxx>: > All those really are is a telephone line -> sound card interfaces. > Typically these just handle converting the signals from the sound card > in to the phone line signals.