03.533GPPService descriptionStage 2Tandem Free Operation (TFO)TS
This Technical Specification (TS) has been produced by the Special Mobile Group (SMG).
The present document defines the stage 2 service description for Tandem Free Operation (TFO) in GSM. Tandem Free Operation applies only to speech calls.
The contents of the present document is subject to continuing work within SMG and may change following formal SMG approval. Should SMG modify the contents of the present document, it will be re-released by SMG with an identifying change of release date and an increase in version number as follows:
8 Indicates GSM Phase 2+ Release 1999;
y the third digit is incremented when editorial only changes have been incorporated in the specification;
x the second digit is incremented for all other types of changes, i.e. technical enhancements, corrections, updates, etc.