PDPL Lines and Calls

The Public Switched Telephone Network (PSTN) is the aggregate of telephone networks across the world, managed at a national, regional, and local level. It was originally made up of copper wire circuits and designed for analogue voice communication. As technology has developed and usage and requirements have changed over the years, it has become clear that the PSTN is no longer fit for purpose and there are more effective and efficient means of transferring data and communicating. The UK public telephone network is...