The full form of PSTN is Public Switched Telephone Network. It’s used on Technology ,Communication in Worldwide
The Public Switched Telephone Network (PSTN) is the the global interconnects of circuit-switched telephones networks. It consists of telephone lines, fiber optic cables, microwave transmission links, cellular networks, communications satellites, and undersea telephone cables, all inter-connected by switching centers, thus allowing any telephone in the world to communicate with any other.
PSTN
means
Public Switched Telephone Network
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