PSTN (Public Switched Telephone Network)

The Public Switched Telephone Network (PSTN) is the traditional network for voice communication that connects landline phones worldwide. It uses a system of interconnected telephone lines, switches, and exchanges to route calls between users. When you dial a number, your call travels through this network, connecting to the recipient’s phone. PSTN technology has been around for over a century and primarily handles audio signals, but it’s also evolving to support digital services. Although mobile phones and internet-based calling are becoming more common, PSTN remains a vital part of global telecommunications infrastructure.