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bn:18023341n
Noun Named Entity
PT
No term available
EN
Plain old telephone service, or plain ordinary telephone system, is a retronym for voice-grade telephone service employing analog signal transmission over copper loops. Wikipedia
Relations
Sources
IS A
serviço de telecomunicações
HAS PART
DTMF
USES
telefone fixo
rede pública de telefonia comutada

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