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The Frame Relay Frame Relay (or Frame-mode Bearer Service ) is a communication technique through frame relay for virtual circuit networks, introduced by the ITU-T from recommendation I.122 of 1988. It consists of a simplified form of technology packet switching that transmits a variety of frame sizes or frames (" frames ") for data, perfect for transmitting large amounts of data. The technique Frame Relay it is used for a high-speed voice and data transmission service that allows the interconnection of geographically separated local area networks at a lower cost. Types PVC: PERMANENT VIRTUAL CIRCUIT. Virtual circuit that is established permanently. PVCs save bandwidth associated with the establishment and cutting of circuits, if certain virtual circuits must exist at all tim...