VSAT or Very Small Aperture Terminals are small, software-driven earth stations used for the reliable transmission of data, video, or voice via satellite. It requires no staff or additional technology to operate it. It simply plugs into existing terminal equipment.
A VSAT network consists of a central hub (master earth station), many remote VSATs, and the satellite transponder space segment. The hub station is always larger than the remote VSATs and is frequently located near the user's main data processing center. A VSAT is located at each end-user location, which can consist of several dozen to several thousand sites. From a communications perspective, there are two segments within the network transmission process. They include the earth segment, which consists of the equipment at the hub and VSAT locations; and the space segment, which is the link to and from the satellite.
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