High Speed Circuit Switched Data (HSCSD)

Definition: GSM is currently a circuit switched technology and HSCSD is the final evolution of circuit switched data within the GSM environment. It is an upgrade to GSM networks that enables data rates to increase from 14.4 kbps, and HSCSD will enable the transmission of data over a GSM link at speeds of up to 57.6kbit/s. This is achieved by concatenating, i.e. adding together, consecutive GSM timeslots, each of which is capable of supporting 14.4kbit/s. Up to four GSM timeslots are needed for the transmission of HSCSD (out of a total of eight slots on the network).

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