VoIP

PSTN

PSTN is the Public Switched Telephone Network, the system
based on circuit-switched technology for real time voice
transmissions.

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PABX

The term PABX refers to a Private Automated Branch Exchange.
It is a business telephone network where calls are digitally routed within
the organization.

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VoIP

VoIP stands for Voice over Internet Protocol. An Internet telephony system uses hardware and software to send voice data packets over the Internet.

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