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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The IP Multimedia Subsystem core
IMS is an architecture for real-time multimedia (voice, data, video, and messaging) services using a common IP network. It defines a layered architecture. According to the 3GPP specification, IMS entities are classified into six categories:
- Session management and route (CSCF, GGSN, and SGSN)
- Database (HSS and SLF)
- Interworking elements (BGCF, MGCF, IM-MGW, and SGW)
- Service (Application Server, MRFC, and MRFP)
- Strategy support entities (PDF)
- Billing
Interoperability with the SIP infrastructure requires a session border controller to decrypt the WebRTC control and media flows. A media node is also set up for transcoding between WebRTC codecs and other legacy phones. When a gateway is involved, the WebRTC voice and video ...
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