The Internet and the Public Switched Telephone Network -- Disparities, Differences, and Distinctions

This paper discusses the telephone network infrastructure commonly known as the Public Switched Telephone Network (PSTN) and provides insight into fundamental differences between the "traditional" telecommunications network and the Internet.

The Internet has evolved from a research computer network to a vibrant communication platform, based on competition, regulatory independence and transparency, and continuous innovation. Today a significant amount of the world’s voice traffic travels over IP-based networks and the Internet. However, legacy PSTN regulations cannot be transferred or applied directly to the Internet, as there is little commonality between it and the PSTN.