What is PSTN?

The public switched telephone network (PSTN) refers to the aggregate of the world’s local and regional circuit-switched telephone networks.

This includes both commercial and government-owned telephone networks.

Technology Term:

Public Switched Telephone Network

Standard Definition Exists?

The aggregate of the world's circuit-switched telephone networks that are operated by national, regional, or local telephony operators, providing infrastructure and services for public telecommunication.

Accepted Acronym:


Year first used/coined:


Attributed to:


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