

extraHeaders Optional Array of Strings with extra SIP headers for each INFO request. eventHandlers Optional Object of event handlers to be registered to each DTMF tone. Fields in options Object duration Positive decimal Number indicating the duration of the tone expressed in milliseconds. options Object containing the DTMF tone with other extra parameters (see below). Parameters tone String or Number composed by a single valid DTMF symbol. This method is available for outgoing DTMF’s only. Sends a SIP INFO request carrying the given DTMF tone. Number indicating the duration of the tone expressed in milliseconds.
