The datawave is being driven by use of the Internet and by business people transmitting huge amounts of information to colleagues, customers and suppliers. Newspapers and catalogues, graphics and video, bank statements and share prices can all be turned into streams of '0's and '1's, and sent along a telephone line. When people talk to each other over the phone line, they do so for a few minutes, yet when computers talk to each other, they do so for hours, or even days, at a time. This additional traffic can only be good news for BT.