Google Voice is a Voice over IP (VoIP) service that allows users to send and receive calls to and from computers and cell phones, as well as other mobile devices. Google Voice also provides 'visual voice mail' by transcribing voice messages to text for easy management. Google Voice provides ...

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What are the internal workings of Google Voice?

I am new to Google Voice and am interested in how it works internally so I have few doubts about it. Is the Google Voice number itself a SIP number? How does Google Voice receive calls from any PSTN ...