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A Keystone module is an industry standard type of wall jack used in residential and business environments. The system consists of a modular face plate to which jacks are mounted. They are generally used as a termination point for permanent cable installations.

Separate Video, more commonly known as S-Video, and sometimes incorrectly referred to as "Super Video" and also known as Y/C, is an analog video signal that carries the video data as two separate signals, lumen (luminance) and chroma (colour). This differs from composite video which carries picture information as a single lower-quality signal, and component video which carries picture information as three separate higher-quality signals. S-Video carries standard definition video (typically at 480i or 576i resolution), but does not carry audio on the same cable.