03.343GPPHigh Speed Circuit Switched Data (HSCSD)Stage 2TS
HSCSD: High Speed Circuit Switched Data.
HSCSD configuration: A multislot configuration consisting of one or several full rate traffic channels for data transmission.
HSCSD channel: A full rate traffic channel belonging to a HSCSD configuration.
main channel: The only channel in a HSCSD configuration carrying an FACCH.
symmetric configuration: A configuration consisting of bi-directional channels.
asymmetric configuration: A configuration consisting of bi-directional channels and at least one uni‑directional channel.
For further GSM abbreviations see GSM 01.04 .