Public Switched Telephone Network

The Public Switched Telephone Network (PSTN) is a global network of interconnected public telephone networks that facilitates communication using traditional landline telephones. It is a legacy telecommunications infrastructure that has evolved over time to enable voice, fax, and data transmission between users.

Key features and characteristics of PSTN include:

Analog and Digital Communication: PSTN supports both analog and digital communication methods, allowing users to make voice calls, send faxes, and transmit data.

Circuit-Switched Technology: PSTN operates using circuit-switched technology, establishing a dedicated physical circuit for the duration of a call between the caller and the recipient.

Global Connectivity: PSTN provides extensive global connectivity, allowing users to communicate with one another across different regions and countries.

Integration with Other Networks: PSTN is interconnected with other networks, including mobile networks and the internet, enabling seamless communication across various platforms.

While traditional landline telephony has faced challenges due to the rise of mobile communication and VoIP technologies, PSTN remains a fundamental part of the global telecommunications infrastructure, supporting reliable voice communication for many users.