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How is ISN IP PBX different from the traditional Public Switched Telephone Network (PSTN)?

April 26, 2017different IP isn Network PBX PSTN public telephone traditional

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How is ISN IP PBX different from the traditional Public Switched Telephone Network (PSTN)?

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The Public Switched Telephone Network (PSTN) is the traditional phone network which American tax dollars built over the last 100 years and, depending on whose territory you are in, is currently maintained by large telecommunication companies. VoIP uses something called a Session Initiation Protocol (SIP) over the same Internet path that you use to view Web pages. The Internet moves your voice packet just like it would move a data packet.