Voice over IP

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Voice over IP

(communications)
(VoIP) Any technology providing voice telephony services over IP, including CODECs, streaming protocols and session control. The major advantage of VoIP is lower cost, by avoiding dedicated voice circuits.

Currently VoIP is being deployed on internal corporate networks, and, via the Internet, for low cost (and low quality) international calls. It is also used for telephony applications such as voice and fax mail.

The ITU standard is H.323, which is a whole suite of protocols, while the IETF has developed the much simpler SIP to solve the session control problem and MGCP/Megaco to solve the gateway problem.
References in periodicals archive ?
is a leading provider of turnkey Voice over Internet Protocol (VoIP) communications solutions for service providers, resellers and consumers worldwide.
ISS X-Force has discovered a denial of service vulnerability in the IAX2, which is used by Asterisk PBX to exchange Voice over Internet Protocol (VoIP) and call content.
Telephone Calls via Fixed Lines and Voice over Internet Protocol (VoIP) Revenues in France, Q1-Q3 2005 (millions of euros)
Voice over Internet protocol (VoIP) can be implemented in two ways: calls can originate from the traditional TDM circuit switched technology, or originate from an Internet protocol router.
PhoneGnome(TM) is a worldwide voice technology product that seamlessly joins Voice over Internet Protocol (VoIP) communications with a customer's existing Public Switched Telephone Network (PSTN) service, allowing consumers to make Internet calls and PSTN phone calls from the same phone.
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