Voice over Internet Protocol

noun

Definition of Voice over Internet Protocol 

: any of various technologies that support telephony using the Internet for transmission rather than traditional phone lines … you might be ready for Voice over Internet Protocol (VoIP) service, which lets you make telephone calls over the Net to any phone in the world. —Sean Portnoy abbreviation VoIP

First Known Use of Voice over Internet Protocol

1992, in the meaning defined above

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The first known use of Voice over Internet Protocol was in 1992

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