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2. Voice over IP - Wikipedia

   en.wikipedia.org/wiki/Voice_over_IP

   Voice over Internet Protocol ( VoIP ), [ a ] also called IP telephony, is a method and group of technologies for voice calls for the delivery of voice communication sessions over Internet Protocol (IP) networks, [ 2 ] such as the Internet. The broader terms Internet telephony, broadband telephony, and broadband phone service specifically refer ...

3. Google Voice - Wikipedia

   en.wikipedia.org/wiki/Google_Voice

   Google Voice currently provides free PC-to-phone calling within the United States and Canada, and PC-to-PC voice and video calling worldwide between users of the Google+ Hangouts browser plugin (available for Windows, Intel-based Mac OS X, and Linux). [ 5] Almost all domestic and outbound calls to the United States (including Alaska and Hawaii ...

4. VoIP phone - Wikipedia

   en.wikipedia.org/wiki/VoIP_phone

   VoIP phone. A VoIP phone or IP phone uses voice over IP technologies for placing and transmitting telephone calls over an IP network, such as the Internet. [ 1] This is in contrast to a standard phone which uses the traditional public switched telephone network (PSTN). Digital IP-based telephone service uses control protocols such as the ...

5. VoIP spam - Wikipedia

   en.wikipedia.org/wiki/VoIP_spam

   VoIP spam or SPIT (spam over Internet telephony) is unsolicited, automatically dialed telephone calls, typically using voice over Internet Protocol (VoIP) technology.. VoIP systems, like e-mail and other Internet applications, are susceptible to abuse by malicious parties who initiate unsolicited and unwanted communications, such as telemarketers and prank callers.

6. Voice phishing - Wikipedia

   en.wikipedia.org/wiki/Voice_phishing

   Voice over Internet Protocol (VoIP) - Also known as IP telephony, [10] VoIP is a technology that allows voice calls to be made over the internet. [11] VoIP is frequently used in vishing attacks because it allows callers to spoof their caller ID.

7. Yahoo! Voice - Wikipedia

   en.wikipedia.org/wiki/Yahoo!_Voice

   free. Website. voice .yahoo .com. Yahoo Voice was a Voice over Internet Protocol (VoIP), PC-PC, PC-Phone and Phone-to-PC telecommunications service. It was provided by Yahoo via its Yahoo Messenger instant messaging application. [1] [2] Yahoo Voice used the Session Initiation Protocol ( SIP ), GIPS codec and the Dialpad engine for voice transport.