PSTN
PSTN (Public Switched Telephone Network) is the traditional circuit-switched telephone network that enables voice communication over landlines and mobile networks globally. It uses dedicated connections for calls, routing them through switches and exchanges to connect users. This infrastructure forms the backbone for basic telephony services, including local, long-distance, and international calls.
Developers should learn about PSTN when working on telecommunications systems, VoIP (Voice over IP) integration, or applications that require interfacing with traditional phone networks, such as call centers or emergency services. Understanding PSTN is crucial for implementing features like call routing, number portability, or compliance with telecommunication regulations in software projects.