EGERTON UNIVERSITY PUBLIC SWITCHED TELEPHONE NETWORK

Video: PSTN - Public Switched Telephone Network

Sunny Lecture Series

Today my topic is Public Switched Telephone System, or PSTN. PSTN is a century-old worldwide connected telephone network. The PSTN topology and class level might be different in different countries but the original design was only for circuit switching analog telephone calls. Nowadays, the backbone of the PSTN is mostly digital, and most local loops are still using analog technologies.