PSTN(公衆交換電話網 = Public Switched Telephone Network)


PSTN(公衆交換電話網 = Publicly Switched Telephone Network)は固定電話や携帯電話から通話を発信したときに音声通話を伝送するネットワークのことです。 音声を伝送する通話インフラの地球規模のネットワークを指し、私企業や政府によって所有されているインフラも含まれます。

The PSTN is the network that carries voice calls, and interfacing between the internet and the PSTN has traditionally been very costly and difficult. The Twilio Programmable Voice API abstracts this complexity away, giving developers simple verbs like <Dial> and <Conference> to execute what have been extremely difficult voice calling tasks in the past.



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