duration property
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Returns the current tone duration value in milliseconds. This value will be the value last set via the insertDTMF() method, or the default value of 100 ms if insertDTMF() was called without specifying the duration.
Syntax
var sender = new RTCDtmfSender(sendObject);
if (sender.canInsertDTMF) {
var duration = 500;
sender.insertDTMF("1234", duration);
} else {
trace("DTMF function not available");
}
Property values
Type: LONG