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Voice over Internet Protocol (also voice over IP, Vo IP or 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.

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Third-generation providers, such as Google Talk, adopted the concept of federated Vo IP—which is a departure from the architecture of the legacy networks.

These solutions typically allow dynamic interconnection between users on any two domains on the Internet when a user wishes to place a call.

Second-generation providers, such as Skype, built closed networks for private user bases, offering the benefit of free calls and convenience while potentially charging for access to other communication networks, such as the PSTN.

This limited the freedom of users to mix-and-match third-party hardware and software.

Phone calls between subscribers of the same provider are usually free when flat-fee service is not available.

A Vo IP phone is necessary to connect to a Vo IP service provider.This can be implemented in several ways: It is increasingly common for telecommunications providers to use Vo IP telephony over dedicated and public IP networks as a backhaul to connect switching centers and to interconnect with other telephony network providers; this is often referred to as IP backhaul.Because of the bandwidth efficiency and low costs that Vo IP technology can provide, businesses are migrating from traditional copper-wire telephone systems to Vo IP systems to reduce their monthly phone costs.In addition to Vo IP phones, Vo IP is available on many personal computers and other Internet access devices.Calls and SMS text messages may be sent over mobile data or Wi-Fi.For additional information, sign in to My Verizon to access your Account Manager or download the user guide. Register now See also: You can see a snapshot of your most recent calls on your online Account Manager or Fi OS TV.

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