Variables
ontonechange:Function
An EventHandler to handle the tonechange event, which is sent each time an outbound tone starts or finishes playing.
read onlytoneBuffer:String
A DOMString which contains the list of DTMF tones currently in the queue to be transmitted (tones which have already been played are no longer included in the string). See RTCDTMFSender.toneBuffer for details on the format of the tone buffer.