|It can be done with the right equipment but not with a standard wired telephone by itself. To use a telephone over the Internet you need a telephone specifically designed for the purpose. It is called a VoIP phone - Voice over Internet Protocol.|
Some broadband modems have a VoIP interface built in, some need a separate adaptor. You can get VoIP phones the plug connect via USB.
You will also need a VoIP telephone account as well which run in price from very cheap to free.