The data request message is used by the application to send a regular or expedited data packet to the far end (SCCPDataRqst and SCCPEDataRqst) when employing the SCCP connection-oriented services (class 2 or 3). This message is also received by the application to indicate an incoming regular or expedited data packet from a far end point (SCCPDATIND and SCCPEDATIND).
typedef struct sccpDataRqst
{
SccpData data; /* data (M) */
} SccpDataRqst;