Endpoint modules are critically important and add some of the key features that make FreeSWITCH the powerful platform it is. The primary role of endpoint modules is to take certain common communication technologies and normalize them into a common abstract entity, which we refer to as a session. A session represents a connection between FreeSWITCH and a particular protocol. There are several Endpoint modules that come with FreeSWITCH, which implement several protocols such as SIP, H.323, Jingle, Verto, WebRTC, and some others. We will spend some time examining one of the more popular modules named mod_sofia.
Sofia-SIP (http://sofia-sip.sourceforge.net) is an open source project originally developed ...
