Technics used in receiving and making calls?

Receiving and making calls primarily involve two key technologies: circuit switching and packet switching. Circuit switching establishes a dedicated communication path between the caller and receiver for the duration of the call, commonly used in traditional landline systems. In contrast, packet switching breaks calls into smaller data packets that travel over a network, enabling more efficient use of bandwidth and supporting technologies like Voice over internet Protocol (VoIP). Both methods rely on signaling protocols to manage call setup, control, and termination.