Ozeki VOIP SIP SDK

Protocols for VoIP connection

To be able to provide VoIP services several protocols need to be employed. On this page we focus on the four most common ones used to describe VoIP connections.

Protocol is a generic term, a standard that describes how the respective participants communicate with each other. For transmitting audio and video packets between communicating computers Real-Time Protocol (RTP) is used worldwide. But before audio or video media are transmitted between computers other protocols need to be used to find the remote device and to define the means by which media will be transmitted between the two devices. These are call-signaling protocols, such as Session Initiation Protocol (SIP).

VoIP connections are basically described with the following protocols:

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