What is CSD (Circuit-Switched Data)?

Circuit-Switched Data is the type of information transmission advancement for time division multiple access based versatile. CSD uses a solitary radio time slot to convey 9.6 kbit/s information transmission to the GSM network switching subsystem where it could be associated through the normal modem to the Public Switched Telephone Network (PSTN), permitting direct calls to another dial-up assistance. CSD gives direct access to the underlying digital signal, permitting for higher speeds in TDMA-based systems digital transmission.