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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 to ...

3. Videotelephony - Wikipedia

   en.wikipedia.org/wiki/Videotelephony

   Videotelephony (also known as videoconferencing or video call) is the use of audio and video for simultaneous two-way communication. [1] There are many terms to refer to videotelephony. Videophones are standalone devices for video calling (compare Telephone ). In the present day, devices like smartphones and computers are capable of video ...

4. History of videotelephony - Wikipedia

   en.wikipedia.org/wiki/History_of_videotelephony

   [67] [68] The camera phone was the same size as similar contemporary mobile phones, but sported a large camera lens and a 5 cm (2 inch) colour TFT display capable of displaying 65,000 colors, and was able to process two video frames per second. The 155 gram (5.5 oz.) camera could also take 20 photos and convey them by e-mail, with the camera ...

5. Skype - Wikipedia

   en.wikipedia.org/wiki/Skype

   Skype was founded in 2003 by Niklas Zennström, from Sweden, and Janus Friis, from Denmark. [15] The software was created by Estonians Ahti Heinla, Priit Kasesalu, Jaan Tallinn, and Toivo Annus. [16] Friis and Annus are credited with the idea of reducing the cost of voice calls by using a P2P protocol like that of Kazaa. [17]

6. Interactive voice response - Wikipedia

   en.wikipedia.org/wiki/Interactive_voice_response

   Interactive voice response. Interactive voice response ( IVR) is a technology that allows telephone users to interact with a computer-operated telephone system through the use of voice and DTMF tones input with a keypad. In telephony, IVR allows customers to interact with a company's host system via a telephone keypad or by speech recognition ...

7. VoIP recording - Wikipedia

   en.wikipedia.org/wiki/Voip_recording

   Voice over Internet Protocol (VoIP) recording is a subset of telephone recording or voice logging, first used by call centers and now being used by all types of businesses. . There are many reasons for recording voice over IP call traffic such as: reducing company vulnerability to lawsuits by maintaining recorded evidence, complying with telephone call recording laws, increasing security ...