Modern technology allows us to send traffic two ways. For instance, in future subscribers will be able to link up to the World Wide Web on the Internet via modem. They can send information down the telephone line and receive data back via satellite which can transmit huge volumes of information at a time - there's no waiting around as is the case with telephone systems. There will also be TV on demand. The request goes out via telephone line and the programme is beamed back via satellite.
Home shopping is another candidate for satellite technology.
Product information is beamed into the decoder, the consumer makes a few choices and then fires off the information via the telephone line. All of this is automated and takes place behind the on-screen display.