October 2014
Intermediate to advanced
382 pages
8h 27m
English
Content preview from WebRTC Integrator's GuideBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Chapter 3. WebRTC with SIP and IMS
IP Multimedia Subsystem (IMS) is an architectural framework for IP Multimedia communications and IP telephony based on Convergent applications. It specifies three layers in a telecom network:
- Transport or Access layer: This is the bottom-most segment responsible for interacting with end systems such as phones.
- IMS layer: This is the middleware responsible for authenticating and routing the traffic and facilitating call control through the Service layer.
- Service or Application layer: This is the top-most layer where all of the call control applications and Value Added Services (VAS) are hosted.
IMS standards are defined by Third Generation Partnership Project (3GPP) which adopt and promote Internet Engineering Task ...
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