What are the differences between adsl and pstn?

ADSL (Asymmetric Digital Subscriber Line) and PSTN (Public Switched Telephone Network) are both telecommunications technologies, but they serve different purposes. ADSL is a type of broadband connection that allows high-speed internet access over existing telephone lines, with faster download speeds compared to upload speeds. In contrast, PSTN refers to the traditional circuit-switched telephone network that enables voice communication through analog signals. While ADSL is primarily used for internet connectivity, PSTN is dedicated to voice calls.