3 Definitions and abbreviations

23.0533GPPRelease 17Service descriptionStage 2Tandem Free Operation (TFO)TS

3.1 Definitions

For the purposes of the present document, the following terms and definitions apply:

Tandem Free Operation: corresponds to the Mobile-to-Mobile calls for which the speech is not transcoded two times but only one by the Mobile Stations

For simplicity the term MS is also used when UE is meant for 3G systems. The same is valid for TRAU and TC analogously.

3.2 Abbreviations

For the purposes of the present document, the following abbreviations apply:

IPE: In Path Equipment

TFO: Tandem Free Operation

Further abbreviations used may be found in 3GPP TR 01.04 [1].