CSBK data was introduced in R2.3. This feature allows a radio to send a single
unconfirmed CSBK (Control Signalling BlocK) burst containing ARS, GPS or XCMP data. This results in
improved data communication performance and communication reliability.
In the past, (i.e. without CSBK Data) it was only possible to send a maximum
of around 180 GPS updates per minute per radio per slot. Based on the
same parameters, and using CSBK data, it is possible to achieve around
909 GPS updates per minute per radio per slot - a five fold increase!