Laptop running Windows XP or Mac OS X 10.2 or higher CDMA phone (If you have a GSM phone, see GSM USB modem for OS X on the Mac. Windows users, first configure your phone as a modem, then use a ...

What do you need to call a bulletin board? A computer, of course, and a modem, a device that allows a computer to ”talk” over a telephone line. (Modems translate incoming sound waves to… ...