PSTNyhteyksiä

PSTNyhteyksiä refers to Public Switched Telephone Network connections. This is the global system of interconnected analog and digital circuits that forms the backbone of the traditional telephone system. When people make a phone call using a landline telephone, they are typically utilizing PSTN connections to establish communication with the recipient. The PSTN has been a dominant telecommunications infrastructure for over a century, enabling voice communication over vast distances.

The PSTN operates using a complex network of switching centers, transmission lines (including copper wires and fiber optics), and other equipment. Historically, it relied on circuit switching, where a dedicated physical path is established for the duration of a call. This ensures a consistent and reliable connection, though it can be less efficient for data transmission compared to packet-switched networks.

While the PSTN remains operational, its importance is gradually diminishing with the rise of Voice over Internet Protocol (VoIP) and mobile telephony. Many telecommunications providers are migrating their services to IP-based networks, which offer greater flexibility and cost-effectiveness. However, PSTN connections still play a crucial role in many areas, particularly for essential services like emergency calls (e.g., 112) and in regions where broadband infrastructure is less developed. The transition from PSTN to IP-based networks is an ongoing process worldwide.