Having considered in Chapters 1 and 2 how a call is conveyed across one or more networks, this chapter is all about how the exchanges or more precisely, the switching units within the exchanges in a ...

Unlike circuit switching in traditional telephone networks, which requires the establishment of a dedicated point-to-point connection, each packet in a packet-switched network contains a ...

Electricity will only travel around a circuit that is complete. That means it has no gaps. You can use a switch in a circuit to create a gap in a circuit. This can be used to switch it on and off.