3 Definitions and abbreviations

04.933GPPCompletion of Calls to Busy Subscriber (CCBS)Stage 3TS

3.1 Definitions

For the purposes of the present document the following definitions apply.

Subscriber A: The user of MS A, requesting CCBS.

Destination B: The entity addressed in the original call set up, which is busy when first called by subscriber A.

3.2 Abbreviations

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

CCBS Completion of Calls to Busy Subscriber

MS A Mobile Station of subscriber A

NDUB Network Determined User Busy

Further related abbreviations are given in GSMĀ 01.04