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TS 23.053 (SA4)
TFO — Tandem Free Operation – Stage 2

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for a better overview, the Table of Contents (ToC) is reproduced
V15.0.0 (PDF)  2018/06  16 p.
V14.0.0  2017/03  16 p.
V13.0.0  2015/12  16 p.
V12.0.0  2014/09  16 p.
V11.0.0  2012/09  16 p.
V10.0.0  2011/04  16 p.
V9.0.0  2009/12  16 p.
V8.0.0  2008/12  16 p.
V7.0.0  2007/06  16 p.
V6.0.0  2005/01  16 p.
V5.0.0  2002/06  16 p.
V4.0.1  2001/10  16 p.
GSM Rel-99 v8.0.0  2000/03  15 p.
GSM Rel-98 v7.0.1  1999/06  15 p.


Rapporteur:  Mr. Hellwig, Karl
See also:

This TS defines the stage 2 service description for Tandem Free Operation (TFO) in and between GSM and UMTS. Tandem Free Operation applies only to speech calls.