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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 ...
A typical analog telephone adapter for connecting an analog phone to a VoIP provider. Wikimedia Commons has media related to Analog telephony adapter. An analog telephone adapter ( ATA) or FXS gateway is a device for connecting traditional analog telephones, fax machines, and similar customer-premises devices to a digital telephone system or a ...
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 ...
Caller ID. Caller identification ( Caller ID) is a telephone service, available in analog and digital telephone systems, including voice over IP (VoIP), that transmits a caller 's telephone number to the called party 's telephone equipment when the call is being set up. The caller ID service may include the transmission of a name associated ...
Caller ID spoofing. Caller ID spoofing is a spoofing attack which causes the telephone network's Caller ID to indicate to the receiver of a call that the originator of the call is a station other than the true originating station. This can lead to a display showing a phone number different from that of the telephone from which the call was placed.
A telephone VoIP adapter (TVA), also called digital telephone adapter, is a device that interfaces digital private branch exchange (PBX) telephone sets to a Voice over Internet Protocol (VoIP) network, using, for example, the Session Initiation Protocol . An analog telephone adapter (ATA) converts an analog telephone port (Foreign exchange ...
H.323. H.323 is a recommendation from the ITU Telecommunication Standardization Sector (ITU-T) that defines the protocols to provide audio-visual communication sessions on any packet network. [ 1 ] The H.323 standard addresses call signaling and control, multimedia transport and control, and bandwidth control for point-to-point and multi-point ...
Web-based VoIP is the integration of voice over IP technologies into the facilities and methodologies of the World-Wide Web. It enables digital communication sessions between Web users or between users of traditional telecommunication services. Instead of using dedicated, hardware-based VoIP devices, such as IP phones, analog telephone adapters ...
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