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DVB-RCS (Digital Video Broadcasting - Return Channel via Satellite) provides a method by which the DVB-S platform (and in theory also the DVB-S2 platform) can become a bi-directional, asymmetric data path using wireless between broadcasters and customers. It is a specification for an interactive on-demand multimedia satellite communication system formulated in 1999 by the DVB consortium. Without this method, various degrees of interactivity can be offered, without implying any return channel back from the user to the service provider: Data Carrousel or Electronic Programs Guides (EPG) are exam