3 Definitions

23.0343GPPHigh Speed Circuit Switched Data (HSCSD)Release 17Stage 2TS

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

A/Gb mode: mode of operation of the MS when connected to the Core Network via GERAN and the A and/or Gb interfaces.

GERAN: GSM/EDGE radio access network

HSCSD: High Speed Circuit Switched Data

HSCSD configuration: multislot configuration consisting of one or several full rate traffic channels for data transmission

HSCSD channel: full rate traffic channel belonging to a HSCSD configuration

Iu mode: mode of operation of the MS when connected to the Core Network via GERAN or UTRAN and the Iu interface. When preceded by the word GERAN or UTRAN, it means access over the Iu interface using the respective radio access network.

main channel: only channel in a HSCSD configuration carrying an FACCH

symmetric configuration: configuration consisting of bi-directional channels

asymmetric configuration: configuration consisting of bi-directional channels and at least one uni‑directional channel

UTRAN: UMTS radio access network

For further abbreviations see 3GPP TR 21.905 [1a].