nfxAnswerFaxPoll

typedef struct 
{
  DWORD size;
 DWORD modemtype;   /* NFX_MODEM_TYPE_V17, NFX_MODEM_TYPE_V27,             */
     /* or NFX_MODEM_TYPE_V29             */
 DWORD minrate;     /* NFX_BIT_RATE_2400, NFX_BIT_RATE_4800,             */
     /* NFX_BIT_RATE_7200, or NFX_BIT_RATE_9600            */
 DWORD resolution;/* NFX_RESOLUTION_HIGH, NFX_RESOLUTION_LOW or                */
     /* NFX_RESOLUTION_SUPER_HIGH            */
 DWORD encoding;    /* NFX_ENCODE_1D, NFX_ENCODE_2D, NFX_ENCODE_MMR      */
 DWORD pagewidth;  /* NFX_PAGE_WIDTH_A4, NFX_PAGE_WIDTH__B4, or              */
      /* NFX_PAGE_WIDTH_A3            */
 DWORD OTFmode;     /* NFX_OTF_NEVER, NFX_OTF_ALWAYS,             */
     /* or NFX_OTF_ONLY_IF_FAIL            */
 DWORD useECM;     /* NFX_YES or NFX_NO            */
 DWORD useCNG;     /* NFX_YES or NFX_NO            */
 DWORD PRIenabled;/* NFX_YES or NFX_NO                */
 DWORD timeout;    /* number of seconds to wait for receiver            */
 DWORD retrainaction;
     /* NFX_RTN_REPEAT_PAGE or NFX_RTN_NEXT_PAGE            */
 DWORD addheader;    /* NFX_YES or NFX_NO            */
 INT32 level;    /* transmit level in tenths of dBm (-150 to -60)            */
 INT32 threshold;    /* lowest level for receive, in tenths of dBm            */
 DWORD NSFlength;    /* length of NSF field or 0 if none            */
 char SID[NFX_MAX_SID];  /* Subscriber ID string              */
 BYTE NSF[NFX_MAX_NSF];  /* default NSF for session              */
} NFX_TRANSMIT_PARMS;

Note: nfxAnswerFaxPoll must be called within three seconds of receiving NFXEVN_POLLED, which is the event that indicates a poll request. If nfxAnswerPoll is not called within three seconds, the fax session times out and the application receives an NFXEVN_SESSION_DONE event.