Coursera Spring Sale
40% Off Coursera Plus Annual!
Grab it
Explore the inner workings of the Public Switched Telephone Network (PSTN) in this 12-minute lightning talk that demystifies one of the most essential yet obscure networks in modern telecommunications. Begin with a historical overview of the PSTN's development before diving deep into the technical mechanics that govern how phone calls traverse the network, whether through cellular connections, SIP trunks, or traditional POTS lines. Discover the distinct rules and protocols that still govern telephone networks despite the widespread transition to IP-based systems, and understand how these legacy systems continue to impact modern IP service providers' operations. Learn about the critical role the PSTN plays as a stepping stone between traditional telecommunications and contemporary IP networks, gaining practical insights into how the US telephone network functions and affects business operations. The presentation covers the technical architecture, routing mechanisms, and regulatory frameworks that make voice communication possible across different network types, providing valuable knowledge for network administrators, telecommunications professionals, and anyone seeking to understand the infrastructure behind everyday phone services.
