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  2. Voice over IP - Wikipedia

    en.wikipedia.org/wiki/Voice_over_IP

    The broader terms Internet telephony, broadband telephony, and broadband phone service specifically refer to the delivery of voice and other communication services, such as fax, SMS, and voice messaging, over the Internet, in contrast to the traditional public switched telephone network (PSTN), commonly known as plain old telephone service (POTS).

  3. Google Voice - Wikipedia

    en.wikipedia.org/wiki/Google_Voice

    Google provides free PC-to-PC voice calling worldwide. As described above, Google Voice users in many countries may make low-cost calls to international phone numbers, and currently may also make free PC-to-phone calls within the United States and Canada. Vincent Paquet, a co-founder of GrandCentral who became a senior product manager at Google ...

  4. VoIP phone - Wikipedia

    en.wikipedia.org/wiki/VoIP_phone

    Flip 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).

  5. Comparison of VoIP software - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_VoIP_software

    This is a comparison of voice over IP (VoIP) software that examines applications and systems used for conducting voice and multimedia communications across Internet Protocol (IP) networks. VoIP technology has transformed telecommunications by offering alternatives to traditional telephony systems while providing enhanced features and cost savings.

  6. Textfree - Wikipedia

    en.wikipedia.org/wiki/Textfree

    TextFree (formerly called Pinger and sometimes stylized as textfree) is a mobile application and web service that allows users to send and receive text messages, as well as make and receive VoIP phone calls, for free over the internet. The service costs nothing because it is supported by ads, but users have the option of paying for an ad-free ...

  7. Facebook starts turning on free voice calls for iPhone users ...

    www.aol.com/news/2013-01-16-facebook-starts...

    The voice call needs to be made over WiFi, however, so don't expect to completely replace your contact list and dialer yet (update: calls can be made over a cellular data connection as well).

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