02.343GPPHigh Speed Circuit Switched Data (HSCSD)Stage 1TS
For the purposes of the present document, the following abbreviations apply:
HSCSD High Speed Circuit Switched Data
MO Mobile Originated
MT Mobile Terminated
NT Non Transparent
AIUR Air Interface User Rate
FNUR Fixed Network User Rate
Additional GSM related abbreviations can be found in GSM 01.04 .
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.