Discussion

Introduced a new callback method [TVOCallDelegate callDidStartRinging:]. This callback is invoked once before the [TVOCallDelegate callDidConnect:] callback when the callee is being alerted of a Call. The duration of the TVOCallStateRinging is determined by the answerOnBridge flag provided in the Dial verb of your TwiML application associated with this client. If the answerOnBridge flag is false, which is the default, the [TVOCallDelegate callDidConnect:] callback will be emitted immediately after [TVOCallDelegate callDidStartRinging:]. If the answerOnBridge flag is true this will cause the Call to emit the callDidConnect callback only until the call is answered. See https://www.twilio.com/docs/voice/twiml/dial#answeronbridge for more details on how to use it with the Dial TwiML verb. If the twiML response contains a Say verb, then the call will emit the [TVOCallDelegate callDidConnect:] callback immediately after [TVOCallDelegate callDidStartRinging:] is raised, irrespective of the value of answerOnBridge being set to true or false.