Hi, I bought a 2nd hand macbook A1181 with 4G ram for home use, and has since upgraded the OS to ML with no problems....I just have a curiousity. The last owner must have used it as a modem as there is a phone symbol on taskbar...(see 1st attached)..and if I open network preferences, it asks me configuration and telephone number (see 2nd attached). Can someone tell me how to use this? What is it for? I tried googling it but didn't come up with anything... Thanks in advance. P.