# NCC.X.ADI_START.cleardown

The following table describes NCC.X.ADI_START.cleardown parameters:

NCC.X.ADI_START.cleardown
Dependent function: nccStartProtocol
Field | Type | Default | Units | Description
--- | --- | --- | --- | ---
bandw1 | DWORD | 40 | Hz | Bandwidth for first frequency of the cleardown detector. Valid range is 20 to 800.
bandw2 | DWORD | 40 | Hz | Bandwidth for second frequency. Valid range is 20 to 800.
freq1 | DWORD | 350 | Hz | First frequency to detect. Valid range is 1 to 4000.
freq2 | DWORD | 440 | Hz | Second frequency to detect, or 0 if detecting single frequency. Valid range is 1 to 4000.
maxofftime | DWORD | 0 | ms | Maximum time tone may be OFF to qualify. For continuous tones, this parameter is ignored. For cadenced tones, the count is reset if the interval between any two tones is longer than this time. Valid range is 0 to 32767.
maxontime | DWORD | 0 | ms | Maximum time tone must be ON to qualify. For continuous tones, this parameter is ignored. For cadenced tones, the count is reset if any tone is longer than this time. Valid range is 0 to 32767.
minofftime | DWORD | 0 | ms | Minimum time tone must be OFF to qualify. For continuous tones, this parameter is ignored. For cadenced tones, the count is reset if the interval between any two tones is shorter than this time. Valid range is 0 to 32767.
minontime | DWORD | 0 | ms | Minimum time tone must be ON to qualify. For continuous tones, this parameter is ignored. For cadenced tones, the count is reset if any tone is shorter than this time. Valid range is 0 to 32767.
qualampl | INT32 | -28 | dBm | Minimum signal level recognized as a hang-up tone. Valid AG and CG range is -51 to -15. Valid QX range is -48 to 0.
qualtime | DWORD | 1000 | ms | Minimum duration of tone before a hang-up is recognized. The valid range is 0 to 32767. qualtime is ignored if tonecount is non-zero (cadenced tones).
reflevel | DWORD | 0xB000 | IDU | Do not modify.
reserved | DWORD | 0 | internal | Do not modify.
tonecount | DWORD | 0 | integer | Minimum number of cadenced tones detected before reporting the cleardown event. For continuous tones, set this parameter to 0.