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TS 23.172CT3
Circuit Switched (CS) Multimedia Service
UDI/RDI Fallback
and Service Modification

use "3GPP‑Page" to get the Word version
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for a better overview, the Table of Contents (ToC) is reproduced
V15.0.0 (PDF)  2018/06  61 p.
V14.0.0  2017/03  61 p.
V13.0.0  2015/12  61 p.
V12.0.0  2014/10  61 p.
V11.0.0  2012/09  61 p.
V10.0.1  2011/04  61 p.
V9.0.0  2009/12  61 p.
V8.0.0  2008/12  61 p.
V7.0.0  2007/06  61 p.
V6.4.0  2006/03  61 p.
V5.6.0  2005/06  44 p.

Rapporteur:  Mrs. Biondic, NevenkaEricsson LM

This service is available to UDI/RDI multimedia calls and allows users to achieve successful call establishment when end to end circuit-switched (CS) multimedia is not possible (fallback to speech) or when signalling of the feature is not possible in the network (fallback to preferred service or speech). Furthermore, it allows the users to swap between a multimedia service and basic speech during an established call.

full Table of Contents for  TS 23.172  Word version:   15.0.0

Here   Top
1  ScopeWord-p. 6
2  References
3  Definitions and abbreviationsWord-p. 7
4  Service change and fallback for UDI/RDI multimedia
4.1  General Requirements
4.2  Access Call Control SignallingWord-p. 8
4.3  Core Network proceduresWord-p. 22
5  Lawful InterceptionWord-p. 58
A  Change historyWord-p. 59

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