22.0933GPPCompletion of Calls to Busy Subscriber (CCBS)Release 17Service description, Stage 1TS

This Technical Specification has been produced by the 3GPP.

This TS specifies the stage 1 description of Completion of Calls to Busy Subscriber (CCBS) from the subscriber’s and user’s points of view; in particular:

– the procedures for normal operation with successful outcome;

– the action to be taken in exceptional circumstances;

– the interaction with other 3GPP supplementary services.

within the 3GPP system.

This Technical Specification has been produced by the 3rd Generation Partnership Project (3GPP).

The contents of the present document are subject to continuing work within the TSG and may change following formal TSG approval. Should the TSG modify the contents of the present document, it will be re-released by the TSG with an identifying change of release date and an increase in version number as follows:

Version x.y.z


x the first digit:

1 presented to TSG for information;

2 presented to TSG for approval;

3 or greater indicates TSG approved document under change control.

y the second digit is incremented for all changes of substance, i.e. technical enhancements, corrections, updates, etc.

z the third digit is incremented when editorial only changes have been incorporated in the document.