# CDI_DTMFDETECTOR_PARMS

CDI_DTMFDETECTOR_PARMS controls the DTMF detector.

#### Dependent function

cdiStartDTMFDetector

Field name | Type | Units | Default | Description
onqualtime | DWORD | ms | 30 | Indicates the minimum duration for a DTMF (in ms). Tones shorter than this duration are ignored. Valid values: 30 - 32766
offqualtime | DWORD | ms | 30 | Indicates the minimum duration of silence after a DTMF (in ms). If two identical DTMFs follow one another, and the interval of silence between the tones is shorter than offqualtime, the detector considers them a single DTMF instance. Valid values: 30 - 32766
DTMF_mode | DWORD | Flag | 0 | Determines when CDIEVN_DTMF_STARTED is sent to the application, indicating that a DTMF tone started. Valid values: 0 = Event is sent after the qualification time (onqualtime). 1 = Event is sent when the key is released.