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Definition of "Very Small Aperture Terminal" |
Very Small Aperture Terminal is a two-way satellite ground station or a stabilized maritime VSAT antenna with a dish antenna that is smaller than 3 meters. The majority of VSAT antennas range from 75 cm to 1.2 m. Data rates typically range from 4 kbit/s up to 4 Mbit/s and sometimes up to a max downlink of up to 16 Mbit/s with some upgraded modules and enhancements. VSATs access satellite in geosynchronous orbit to relay data from small remote earth stations terminals to other terminals in mesh topology or master earth station "hubs" in star topology. / Broadband Integrated Services Digital Network is both a concept and a set of services and developing standards for integrating digital transmission services in a broadband network of fiber optic and radio media. BISDN will encompass frame relay service for high-speed data that can be sent in large bursts, the Fiber Distributed-Data Interface, and the Synchronous Optical Network. BISDN will support transmission from 2 Mbps up to much higher, but as yet unspecified, rates. |
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