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Circuit Switched Data (CSD)

Circuit switched data is a service that uses a single radio time slot to deliver data transmission to the GSM Network and switching sub-system. Upon arrival at the switching sub-system, it can be connected through the equivalent of a normal modem to the Public Switched Telephone Network (PSTN) allowing direct calls to any dial up service.

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Complete voice and data
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Wireless

Radio/ Terrestrial Wireless

Radio, marine, microwave,
telemetry, and other
wireless applications