| 摘要 |
An information offering system allows users to obtain desired information readily without being swayed by their own level of skill. The information offering system is composed of a centre CE as an information offerer and user terminals TE which receive the offer of the information from the centre CE. The centre CE is provided with a transmission antenna AT for transmitting radio signals RF1 to a communication satellite SA. The communication satellite SA re-transmits radio signals RF2 to the terminal TE. Thereby, a satellite broadcasting network is constructed as a first communication mode for supplying partial information from the centre CE to the terminal TE. A communication network such as ISDN using a cable CA as a medium is also constructed between the centre CE and the terminal TE to be able to transmit whole information specified by the terminal TE from the centre CE to the terminal TE in a second communication mode by means of a line transmission mode. <IMAGE> |
