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Public switched telephone network

Aggregate of all circuit-switched telephone networks

Pronunciation
/ˈpəblɪk swɪʧt ˈtɛləˌfoʊn ˈnɛtˌwərk/
/ˈpʌblɪk swɪʧt ˈtɛlɪfəʊn ˈnɛtwəːk/
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