What does PSTN stand for?

Here's a list of possible definitions for the shorthand PSTN:



Public Switched Telephone NetworkMilitary
Public Switch Telephone NetworkTelecom
Public Switched Telephony NetworkTelecom
Public Switching Telephone NetworkTechnology
Plain Standard Telephone NetworkUnclassified
Public Switched Telecommunications NetworkTelecom
Professional Security Training NetworkUnclassified
Public Switched Technology NetworkTechnology
Public Switches Telephone NetworkTechnology

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