As discussed in previous posts, WebRTC standards do not specify a signaling protocol. In general this decision is positive by giving developers the freedom to select (or invent) the protocol that best suits the particular WebRTC application’s needs. This can also reduce the time to market since standards compliance-related tasks are minimized. WebRTC media and data protocols from the provider to the user are standardized, so the lack of a standardized signaling protocol does not hurt interoperability of subscribers within the same network service. The calling party just has to have a URL from the called party to download its web app and to establish a WebRTC session with them. They both connect to the same web server and will then utilize the same signaling scheme. This is a new paradigm that is often difficult to embrace for traditional telephony developers who are used using the SIP protocols for handling all signaling, including the User to Network Interface (UNI) and Network-to-Network Interface (NNI).
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