Once the initial parameters have been established, the actual call and media data transfer happens directly between the endpoints in a peer to peer fashion. SIP is used to initiate the call between two or multiple parties via SIP proxy servers. What the end-user considers a single phone call is actually divided into two phases – ‘call set up’ and ‘media transfer.’ SIP is used in the call set up phase and implemented in the application layer. These sessions may involve audio, video, instant messages, 2 callers, multiple callers or any combination of the above variables. The Session Initiation Protocol – which is abbreviated to SIP – is one such protocol that is used for signalling, setting up and controlling multimedia sessions. These rules define the syntax, method, standards and semantics of communication, to minimize confusion and make sure communication sessions can proceed efficiently. In the world of telecommunications and network engineering, a protocol is a set of rules that can be used by two entities to transmit data, information or signals. This is all possible and is very easy to do. Many users are looking for a solution that allows them to make SIP calls on Android phones. The increasing use of smartphones in the enterprise and beyond is creating new needs. Virtually all hosted VoIP services and local deployments are based on SIP. In this guide, you will learn how to configure your Android phone to make SIP calls. In the current article about VoIP calls on Android, we are going to explain how Android users can take advantage of VoIP telephone calls and the array of possibilities Android users have with VoIP. Also, in later articles, we are going to discuss the differences between each technology and talk about mobile apps reliability. VoIPstudio Android and iOS mobile phones apps are already using WebRTC but as you will discover later in this article you can still make and receive calls on VoIPstudio using chrome native SIP client or any Third-party SIP app. So VoIP providers keep in place the SIP servers and networks but under client-side now customer can choose to use: “Pure SIP phone client” or “WeRTC based application” It is just a set of tools (SDK) that work together with SIP infrastructure to offer more versatile apps under the user side app. WebRTC is not a separate technology to SIP.

But there is also recent technology used to handle VoIP calls over web-based applications called WebRTC. Today, the most widely used VoIP protocol is the Session Initiation Protocol or SIP.

VoIP phone services have been steadily increasing in popularity.

Using voip on cell phone