HSCSD (High-Speed Circuit Switched Data)

A system for data calls on GSM networks that came before packet based systems such as GPRS and EDGE. HSCSD is the “high-speed” variant of CSD (maximum speed of 9.6 kbps) that has better error-correction codes that give a boost in speed of about 50% and allows several call channels to be used as one – up to four channels – resulting in a maximum speed of 57.6 kbps. HSCSD was never widely adopted outside Europe.




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