Matches in DBpedia 2014 for { <http://dbpedia.org/resource/Voice_over_IP> ?p ?o. }
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- Voice_over_IP abstract "Voice over Internet Protocol (VoIP) is a methodology and group of technologies for the delivery of voice communications and multimedia sessions over Internet Protocol (IP) networks, such as the Internet. Other terms commonly associated with VoIP are IP telephony, Internet telephony, voice over broadband (VoBB), broadband telephony, IP communications, and broadband phone service.The term Internet telephony specifically refers to the provisioning of communications services (voice, fax, SMS, voice-messaging) over the public Internet, rather than via the public switched telephone network (PSTN). The steps and principles involved in originating VoIP telephone calls are similar to traditional digital telephony and involve signaling, channel setup, digitization of the analog voice signals, and encoding. Instead of being transmitted over a circuit-switched network, however, the digital information is packetized, and transmission occurs as Internet Protocol (IP) packets over a packet-switched network. Such transmission entails careful considerations about resource management different from time-division multiplexing (TDM) networks.Early providers of voice over IP services offered business models and technical solutions that mirrored the architecture of the legacy telephone network. Second-generation providers, such as Skype, have built closed networks for private user bases, offering the benefit of free calls and convenience while potentially charging for access to other communication networks, such as the PSTN. This has limited the freedom of users to mix-and-match third-party hardware and software. Third-generation providers, such as Google Talk, have adopted the concept of federated VoIP—which is a departure from the architecture of the legacy networks. These solutions typically allow dynamic interconnection between users on any two domains on the Internet when a user wishes to place a call.VoIP systems employ session control and signaling protocols to control the signaling, set-up, and tear-down of calls. They transport audio streams over IP networks using special media delivery protocols that encode voice, audio, video with audio codecs, and video codecs as Digital audio by streaming media. Various codecs exist that optimize the media stream based on application requirements and network bandwidth; some implementations rely on narrowband and compressed speech, while others support high fidelity stereo codecs. Some popular codecs include μ-law and a-law versions of G.711, G.722, which is a high-fidelity codec marketed as HD Voice by Polycom, a popular open source voice codec known as iLBC, a codec that only uses 8 kbit/s each way called G.729, and many others.VoIP is available on many smartphones, personal computers, and on Internet access devices. Calls and SMS text messages may be sent over 3G or Wi-Fi.".
- Voice_over_IP wikiPageID "75028".
- Voice_over_IP wikiPageRevisionID "606341249".
- Voice_over_IP hasPhotoCollection Voice_over_IP.
- Voice_over_IP subject Category:Audio_network_protocols.
- Voice_over_IP subject Category:Broadband.
- Voice_over_IP subject Category:Videotelephony.
- Voice_over_IP subject Category:Voice_over_IP.
- Voice_over_IP type Abstraction100002137.
- Voice_over_IP type AudioNetworkProtocols.
- Voice_over_IP type Communication100033020.
- Voice_over_IP type Direction106786629.
- Voice_over_IP type Message106598915.
- Voice_over_IP type Protocol106665108.
- Voice_over_IP type Rule106652242.
- Voice_over_IP comment "Voice over Internet Protocol (VoIP) is a methodology and group of technologies for the delivery of voice communications and multimedia sessions over Internet Protocol (IP) networks, such as the Internet.".
- Voice_over_IP label "IP-Telefonie".
- Voice_over_IP label "IP-telefonie".
- Voice_over_IP label "IP-телефония".
- Voice_over_IP label "IP电话".
- Voice_over_IP label "VoIP".
- Voice_over_IP label "Voice over IP".
- Voice_over_IP label "Voice over IP".
- Voice_over_IP label "Voice over Internet Protocol".
- Voice_over_IP label "Voix sur IP".
- Voice_over_IP label "Voz sobre IP".
- Voice_over_IP label "Voz sobre Protocolo de Internet".
- Voice_over_IP label "الصوت عبر الإنترنت".
- Voice_over_IP sameAs Voice_over_Internet_Protocol.
- Voice_over_IP sameAs IP-Telefonie.
- Voice_over_IP sameAs VoIP.
- Voice_over_IP sameAs Voz_sobre_Protocolo_de_Internet.
- Voice_over_IP sameAs VoIP.
- Voice_over_IP sameAs Voix_sur_IP.
- Voice_over_IP sameAs Voice_over_IP.
- Voice_over_IP sameAs Voice_over_IP.
- Voice_over_IP sameAs VoIP.
- Voice_over_IP sameAs 음성_인터넷_프로토콜.
- Voice_over_IP sameAs IP-telefonie.
- Voice_over_IP sameAs Voice_over_Internet_Protocol.
- Voice_over_IP sameAs Voz_sobre_IP.
- Voice_over_IP sameAs m.0jzgd.
- Voice_over_IP sameAs Q81945.
- Voice_over_IP sameAs Q81945.
- Voice_over_IP sameAs Voice_over_IP.
- Voice_over_IP wasDerivedFrom Voice_over_IP?oldid=606341249.
- Voice_over_IP isPrimaryTopicOf Voice_over_IP.