nfxGetSessionStatus

typedef struct 
{
 DWORD size;
 DWORD rate; 
 DWORD ecm;     /* error correction mode: NFX_YES or NFX_NO     */
 DWORD resolution;
 DWORD encoding;
 DWORD pagewidth;
 DWORD mode;     /* NFX_MODE_IDLE, NFX_MODE_NEGOTIATING,        */
                 /* NFX_MODE_TRANSMITING, NFX_MODE_RECEIVING,   */
                 /* NFX_MODE_DISCONNECTING, NFX_MODE_FINISHED   */
 DWORD error;    /* Last error code generated                   */
 DWORD docnumber;/* Current document in progress                */
 DWORD pagenumber;/* Current page of the document               */
 DWORD badlines; /* Number of bad lines (or bad frames in       */
                 /* ECM mode) during current session            */
 char filename[NFX_FILENAME_MAX]; /* Name of current file       */
                 /* processed                                   */
 char remoteSID[NFX_MAX_SID];                                   
                  /* Received SID from remote station            */
 BYTE remoteNSF[NFX_MAX_NSF];                                   
                 /* Received NSF from remote station            */
 DWORD snr;      /* signal to noise ratio in dB                 */
 DWORD rx_training_zeros;                                       
                 /* training zeros in the TCF                   */
                 /* in tens of milliseconds                     */
 char remoteSUB[NFX_MAX_SUB];                                   
                 /* Received Sub-Address string from            */
                 /* remote station                              */
 DWORD sub_sent;                                                
                 /* Set if Sub-Address frame is sent to         */
                 /* remote station                              */
 DWORD modemtype;/* modem used to transfer document             */
} NFX_FAX_STATUS;

Note: Modem metrics are currently supported on the AG, CG, and QX boards. For AG Quad boards, the value returned in the snr and rx_training_zeros fields is zero.