N-GEN Communications Web-based Seminars ©NGCS

Seminar - An Overview of Communications Technologies

Module 9 - Wireless Systems and Technologies                                                                                 Slide 71 of 80                                                                                                    ________________

    Satellite Communications
Very Small Aperture Terminal System (VSAT)

                                            Earth Stations

                                            Small Aperture Dish Antenna

                                Data Transmission Speeds

                                            Applications

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A small ground-based satellite dish antenna is used to communicate with a large central satellite dish antenna and from there to a central computer system. The signals from the remote end users are transmitted to the central satellite dish via satellite at 256 K bps.

VSAT is located at the customer's site connected directly to their equipment. The system can be configured for one-way or two-way transmission up to 256 K bps.

Typical applications: networking Automatic Teller Machines, Point-of-Sale terminals, financial/news networks and other inquiry-response applications.

The greatest interest has been in developing countries such as India, China and Indonesia