SipDialTone

This event is sent to application software whenever the telephony engine plays dial tone. The application generally receives this event when going off hook (when there is no pending incoming phone call) and when initiating a call using the MakeCall API procedure.

Application software will always receive this event for the above mentioned cases. If the application software has disabled internal telephony engine dial tone generation using the EnableDialTone API procedure, application software can use this event to play its own dial tone to the user.