Web-based real-time communication is a service standardized by the IETF and World Wide Web Consortium (W3C) (called real-time communication in web-browsers (WebRTC) or RTCWeb service) and defines a particular protocol suite for IP-based communication in web browser environments. This application is related to multimedia conversational services which cover typical service components such as: telephony, conferencing, instant messaging. The native IETF/W3C WebRTC service (as defined for the public Internet by the IETF) will be embedded in other IP communication infrastructures such as next generation network (NGN)/ IP multimedia subsystem (IMS).