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Pseudowire (PW) is an emulation of a wired connection. It is the emulation of various telecommunication or networking services such as edge-to-edge connection over packet-switching networks (PSN).
It emulates the essential attributes of a packet-switching network such as ATM, Ethernet or Frame Relay. It allows the transport of these legacy services over new systems such as Multiprotocol Label Switching (MPLS) cores.