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[[File:Voip-typical.gif|Voip-typical|thumb]] [[File:Gigabyte_BRIX_as_Asterisk-based_PBX.jpg|Gigabyte BRIX as Asterisk-based PBX|thumb|left]] '''Voice over Internet Protocol''' ('''VoIP'''), also known as '''IP telephony''', 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]]. The terms '''Internet telephony''', '''broadband telephony''', and '''broadband phone service''' specifically refer to the provisioning of communications services (voice, fax, SMS, voice-messaging) over the public Internet, rather than via the public switched telephone network (PSTN), also known as plain old telephone service (POTS).

==Overview==
VoIP works by converting voice signals into digital data packets and transmitting them over the internet or any other IP-based network. It can be used on various devices, including traditional telephones with adapters, dedicated VoIP phones, computer software, and mobile applications. The technology encompasses a range of protocols and components, such as [[Session Initiation Protocol]] (SIP), which is used to initiate, maintain, and terminate real-time sessions.

==History==
The development of VoIP technology began in the early 1990s. The first successful VoIP call was made in 1995, which marked the beginning of the shift towards the convergence of voice and data networks. Since then, VoIP has evolved significantly, with improvements in quality, reliability, and security, making it a viable alternative to traditional telephone services.

==Advantages==
VoIP offers several advantages over traditional telephony, including lower costs, greater flexibility, and the ability to integrate with a wide range of services. For businesses, VoIP solutions can provide advanced call handling features, such as call forwarding, voicemail to email transcription, and conference calling. For consumers, VoIP services often offer free or low-cost calls, both domestically and internationally.

==Challenges==
Despite its benefits, VoIP faces challenges, including dependency on internet connectivity, power outages, and potential security vulnerabilities. Quality of Service (QoS) can also be an issue, as VoIP traffic competes with other data on the network, potentially leading to delays or degraded call quality.

==Regulation==
The regulation of VoIP services varies by country. Some jurisdictions treat VoIP providers like traditional telecom operators, requiring them to offer emergency call services, comply with wiretapping regulations, and contribute to the universal service fund. Others have adopted a more hands-off approach, allowing the market to dictate the evolution of VoIP technologies.

==Future Directions==
The future of VoIP is likely to see further integration with cloud services, artificial intelligence, and the Internet of Things (IoT), offering more innovative and efficient ways to communicate. The ongoing deployment of 5G networks is also expected to significantly improve VoIP quality and reliability by providing higher bandwidth and lower latency.

[[Category:Telecommunications]]
[[Category:Internet Protocol]]
[[Category:Voice over IP]]

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Voice over IP - Revision history

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