Circuit Switching · Circuit switching There is a dedicated communication path between two stations (end-to-end) The path is a connected sequence of links between network nodes On each physical link, a logical channel is dedicated to the connection Communication via circuit switching has three phases: Circuit establishment (link by link) Routing resource allocation( dm or TDm) Data transfer Circuit disconnect Deallocate the dedicated resources The switches must know how to find the route to the destination and how to allocate bandwidth channel)to establish a connection 66 Circuit Switching • Circuit switching: — There is a dedicated communication path between two stations (end-to-end) — The path is a connected sequence of links between network nodes. On each physical link, a logical channel is dedicated to the connection. • Communication via circuit switching has three phases: — Circuit establishment (link by link) • Routing & resource allocation (FDM or TDM) — Data transfer — Circuit disconnect • Deallocate the dedicated resources • The switches must know how to find the route to the destination and how to allocate bandwidth (channel) to establish a connection