The technical operation of the PSTN adheres to the standards internationally promulgated by the ITU-T. Originally a network of fixed-line analog telephone systems, the PSTN is almost entirely digital in its core network and includes mobile and wireless networks, The network consists of telephone lines, fiber optic cables, microwave transmission links, cellular networks, communications satellites, and undersea telephone cables, interconnected by switching centers, such as central offices, network tandems, and international gateways, which allow telephone users to communicate with each other.
It provides infrastructure and services for public telecommunication. The public switched telephone network ( PSTN) is the aggregate of the world's telephone networks that are operated by national, regional, or local telephony operators. JSTOR ( December 2021) ( Learn how and when to remove this template message).Unsourced material may be challenged and removed.įind sources: "Public switched telephone network" – news Please help improve this article by adding citations to reliable sources.
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