A Very Small Aperture Terminal (VSAT), is a two-way satellite ground station with a dish antenna. An innovative feature of VSAT is that the technology has evolved to the point that previously could only be done with large, high-powered transmitting satellite dishes can now be done with a much smaller and vastly lower-powered antenna at the customer's premises. Nearly all VSAT systems are now based on IP, with a very broad spectrum of applications.
VSATs (Very Small Aperture Terminals or Via Satellite Terminals) have emerged as the preferred means of wide area networking for financial institutions, utilities and services sector, as the VSAT has the ability to integrate data, voice, fax and also voice across remote locations. There are different VSAT
technologies namely SCPC, DAMA, TDM/TDMA, and FTDMA. Adding a new location takes less than a week, and enhancing services is limited to adding or modifying software at Headquarters (Hub Control Station) only. VSATs offer high network reliability (99.5 %), remote accessibility at lower costs, transmission costs independent of distances, and centralized network control, independent of a public carrier. VSATs offer more flexibility in network expansion and redesign whereas the terrestrial network requires re-engineering, which is process that can take months and involve scores of vendors. Car dealerships, gas stations, lottery systems, banks, insurance companies, drug stores, general stores, supermarkets, healthcare companies, manufacturers, couriers, hotel chains, car rental businesses, food manufacturers, heavy industries, mines, electrical utilities, oil and gas pipelines, energy production and
exploration, timber companies, plantations, various government departments and agencies use VSAT systems. VSAT services can be deployed in hours or even minutes (with auto-acquisition antennas).
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