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Virtual Circuit
(VC) A communications arrangement in which data from a source user may be passed to a destination user over various real circuit configurations during a single period of communication. Note: Virtual circuits are generally set up on a per-call basis and are disconnected when the call is terminated; however, a permanent virtual circuit can be established as an option to provide a dedicated link between two facilities. See logical circuit. See also circuit, data, data circuit, network, permanent virtual circuit, virtual call capability.