Starts monitoring call progress analysis data.

DWORD adiStartCallProgress( CTAHD ctahd,
ADI_CALLPROG_PARMS *parms)

ctahd Context handle returned by adiOpenPort.

parms Pointer to call progress analysis parameters, stored in the ADI_CALLPROG_PARMS, as follows (NULL designates default values):

typedef struct
{
 DWORD size;    /* Size of this structure                 */
 DWORD timeout;    
    /* If no tone/voice detected, done via timeout (ms).*/
 DWORD busycount;    
    /* Number of busy cycles until report and quit;     */
    /* busycount ignored if precise busy detected.      */
 DWORD ringcount;  
    /* Number of ring cycles until report and quit.     */
 DWORD maxreorder; 
    /* Separates reorder (fast busy) from busy (ms)     */
 DWORD maxbusy;    /* Separates busy from ring cycle (ms)    */
 DWORD maxring;    /* Separates ring from dial tones (ms)    */
 DWORD maxringperiod;
    /* Maximum ring period before CP_RING_QUIT (ms)     */
 DWORD voicemedium;
    /* Time after VOICE BEGIN until VOICE MEDIUM (ms)   */
 DWORD voicelong;
    /* Time after VOICE BEGIN until VOICE LONG (ms)     */
 DWORD voicextended;
    /* Time after VOICE BEGIN until VOICE EXTENDED (ms) */
 DWORD silencetime; 
    /* Silence period after voice til VOICE END (ms)    */
 DWORD precqualtime; 
    /* Precise tone qualification time (ms)             */
 DWORD precmask;  /* Precise tone mask                       */
 DWORD stopmask;    /* mask to auto-stop adiCallProgress:     */
 INT32 silencelevel;
    /* Reference level below which is "silence"  (dBm)   */
 DWORD voicetoneratio; /* voice vs. tone ratio (IDUs)       */
 DWORD qualtonetime1;
    /* Qualify time 1 for the TONE state (ms);      */
 DWORD qualtonetime2;
    /* Qualify time 2 for the TONE state (ms);      */
 DWORD qualvoicetime1; 
    /* Qualify time 1 for the VOICE state (ms);     */
 DWORD qualvoicetime2; 
    /* Qualify time 2 for the VOICE state (ms);     */
 DWORD leakagetime; 
    /* Leaky integrator time constant (in ms)       */
 DWORD noiselevel; 
    /* Level window for QT2 state (in IDUs)         */
} ADI_CALLPROG_PARMS;

• SUCCESS
• CTAERR_BAD_ARGUMENT
• CTAERR_FUNCTION_ACTIVE
• CTAERR_INVALID_CTAHD
• CTAERR_INVALID_STATE

• ADIEVN_CP_BUSYTONE
  Detected a busy tone.
• ADIEVN_CP_CED
  Detected a "called party" modem or fax terminal tone.
• ADIEVN_CP_DIALTONE
  Detected dial tone.
• ADIEVN_CP_DONE
  Call progress analysis has terminated normally. The event value field may contain one of the following termination conditions or an error code:

CTA_REASON_FINISHED

CTA_REASON_TIMEOUT

CTA_REASON_STOPPED

• ADIEVN_CP_NOANSWER
  Detected "no answer"; the parameterized number of rings were detected without voice being detected.
• ADIEVN_CP_RINGQUIT
  Call progress analysis has stopped detecting ring tones. Ring was previously detected and another ring was not detected in time. This may be caused by a network error or a soft speaker answered the phone. You may want to err on the safe side and treat this event as an answer indication.
• ADIEVN_CP_RINGTONE
  Detected ring tone.
• ADIEVN_CP_RORDTONE
  Detected a reorder (fast-busy) tone.
• ADIEVN_CP_SIT
  Detected a "special information tone" (SIT).
• ADIEVN_CP_STOPPED
  Call progress analysis was terminated by the application.
• ADIEVN_CP_VOICE
  The event value field contains one of the following:

ADI_CP_VOICE_BEGIN

ADI_CP_VOICE_MEDIUM

ADI_CP_VOICE_LONG

ADI_CP_VOICE_EXTENDED

ADI_CP_VOICE_END

This function requires that callp.dsp has been loaded by agmon.

Starts the call progress analysis operation. This is the same functionality utilized by call control. It can be used by applications that are not using standard call control, or by any application during the connected state.

Note: Do not modify the following fields in the ADI_CALLPROG_PARMS structures; doing so may compromise your application's ability to interact with the telephone network:

• voicetoneratio

• qualtonetime1

• qualtonetime2

• qualvoicetime1

• qualvoicetime2

• leakagetime

• noiselevel

The call progress analysis operation always terminates when any of the following events occur:

• ADIEVN_CP_DIALTONE

• ADIEVN_CP_BUSYTONE

• ADIEVN_CP_RORDTONE

• ADIEVN_CP_SIT

• ADIEVN_CP_NOANSWER

• ADIEVN_CP_CED

In addition, you can configure the ADI_CALLPROG stopmask parameter to stop on occurrence of any of the following events:

• ADIEVN_CP_RINGTONE

• ADIEVN_CP_RINGQUIT

• ADIEVN_CP_VOICE_BEGIN

• ADIEVN_CP_VOICE_MEDIUM

• ADIEVN_CP_VOICE_LONG

• ADIEVN_CP_VOICE_EXTENDED

• ADIEVN_CP_VOICE_END

adiStopCallProgress

/* Wait for voice detection or any network tone.
 * Returns SUCCESS if voice is detected within 30 seconds, else DISCONNECT.
 */
int waitforvoice( CTAHD ctahd )
{
    ADI_CALLPROG_PARMS parms;
    ADI_EVENT          event;
    DWORD              last_cp_event = 0;

    adiGetParms (ADI_CALLPROG_PARMID, &parms, sizeof parms);
    parms.stopmask |= ADI_CPSTOP_ON_VOICE_BEGIN;
    parms.timeout  = 30000;      /* Increase timeout from default 10 seconds */

    if( adiStartCallProgress (ctahd, &parms) != SUCCESS )
        return MYFAILURE;

    do 
    {
        myGetEvent( &event );           /* see adiFetchAndProcess example */

        if (ADIEVN_CP_VOICE <= event.id && event.id <= ADIEVN_CP_CED)
             last_cp_event = event.id;

    } while (event.id != ADIEVN_CP_DONE);

    switch (event.value)
    {
        case CTA_REASON_FINISHED:
            if (last_cp_event == ADIEVN_CP_VOICE)
                return  SUCCESS;
            else
                return  MYDISCONNECT;       /* hang-up tone detected */

        case CTA_REASON_TIMEOUT:            /* nothing detected - give up */
        case CTA_REASON_RELEASED:           /* The call was terminated */
        case CTA_REASON_STOPPED:
        default:
            return  MYDISCONNECT;
    }
}