3 Abbreviations and definitions

02.343GPPHigh Speed Circuit Switched Data (HSCSD)Stage 1TS

3.1 Abbreviations

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

HSCSD High Speed Circuit Switched Data

MO Mobile Originated

MT Mobile Terminated

T Transparent

NT Non Transparent

AIUR Air Interface User Rate

FNUR Fixed Network User Rate

Additional GSM related abbreviations can be found in GSMĀ 01.04 [1].

3.2 Definitions

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

Fixed Network User Rate: The user rate between IWF and the fixed network.

Air Interface User Rate: The user rate between Mobile Termination and IWF. For T services it is the maximum possible AIUR not including padding. For NT services it is the maximum possible AIUR.

maximum possible AIUR: The highest possible AIUR that the multiple TCH/F can provide, e.g. 2 TCH/F using TCH/F9.6 provides a maximum possible AIUR of 19,2 kbit/s.

padding: Fill bits needed to adapt the maximum possible AIUR supported by a given number of TCH/F with a given channel coding to a FNUR that is lower than the maximum possible AIUR.