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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 Session Initiation ...
The first commercially available IP phone was the Selsius 30SP. [ citation needed ] In November, 1997, the company sold five 30SP phones to the TRI lab of Southwestern Bell in San Antonio . Selsius Systems was borne out of Incite, a division of Intecom, which was a wholly owned subsidiary of Lagardere SCA , a French conglomerate.
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 the ...
Products in this category are Cisco's range of routers, switches, wireless systems, security systems, WAN acceleration hardware, energy and building management systems and media aware network equipment. [1][2] IP video and phones, TelePresence, HealthPresence, unified communications, call center systems, enterprise social networks and Mobile ...
Footnotes / references. [1][2] Avaya office. Avaya LLC, often shortened to Avaya (/ əˈvaɪ.ə /) and formerly Avaya Inc., is an American multinational technology company headquartered in Morristown, New Jersey, [3] that provides cloud communications and workstream collaboration services. The company's platform includes unified communications ...
Cisco Systems was founded in December 1984 by Leonard Bosack and Sandy Lerner, two Stanford University computer scientists who had been instrumental in connecting computers at Stanford. They pioneered the concept of a local area network (LAN) being used to connect distant computers over a multiprotocol router system.
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