burraak:
Dial Up modem's days are long gone but Land line still exists either in the form of home pbx or PSTN, An Arduino based Dial Up modem shield can be used for a lot of fun projects.
I'm no electronics expert but modem chips are already available with AT Command support
http://www.conexant.com/Product/modems/embmodems/CX93040/Pages/default.aspxI think Arduino can produce this shield in no time what do you think? :~
May I ask where you can buy?