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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.
Traditional PSTN phones can be used as VoIP phones with analog telephone adapters (ATA). A VoIP phone or application may have many features an analog phone doesn't support, such as e-mail-like IDs for contacts that may be easier to remember than names or phone numbers, or easy sharing of contact lists among multiple accounts.
VoIP phones and VoIP telephone adapters connect to routers or cable modems which typically depend on the availability of mains electricity or locally generated power. [48] Some VoIP service providers use customer premises equipment (e.g., cable modems) with battery-backed power supplies to assure uninterrupted service for up to several hours in ...
The main difference between Skype and standard VoIP clients is that Skype operates on a peer-to-peer model (originally based on the Kazaa software [120]), rather than the more usual client-server model (note that the very popular Session Initiation Protocol (SIP) model of VoIP is also peer-to-peer, but implementation generally requires ...
This category is for pages related to voice over IP, or VoIP. Subcategories. ... Telephone VoIP adapter; Traversal Using Relays around NAT; Trunking gateway; V.
The Skype protocol is a proprietary network used for Internet telephony. Its specifications are not publicly available, and all official applications based on the protocol are closed-source . It lacks interoperability with most Voice over IP (VoIP) networks, so it requires licensing from Skype for any integration.
Sipgate logo used from 2004 until 2017. Smartphone apps. Sipgate provided a software application called sipgate for use with Apple iOS and Android devices. In September 2008, the Higher Regional Court of Hamburg (Germany) sided with a request by T-Mobile and issued an injunction preventing the download of sipgate, barring iPhone owners from placing calls over the device's Internet connection ...
In 2003 Robertson founded SIPphone, which utilized the SIP telecommunication standard. In addition to selling phone adapters and routers, SIPphone developed free VOIP software to compete with Skype based on the SIP standard called Gizmo5, which is available on a variety of platforms.
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