![]() ![]() 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. ![]() This article needs additional citations for verification.
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