Start concurrent call

This event is used to start a concurrent call.

{
  "type": "DIALER.START_CONCURRENT_CALL",
  "payload": {
    "to": "String"
  }
}

If you start concurrent call, and if the callee decides to pick-up the call, you shall receive the following DIALER.CALL_STATUS events in this chronological order:

{
  "type": "DIALER.CALL_STATUS",
  "payload": {
    "flow": "regular",
    "status": "startingConcurrent"
  }
}

{
  "type": "DIALER.CALL_STATUS",
  "payload": {
    "flow": "concurrent",
    "status": "ringing"
  }
}

{
  "type": "DIALER.CALL_STATUS",
  "payload": {
    "flow": "concurrent",
    "status": "connected"
  }
}

A concurrent call will finished when one of the concurrent callee leaf the call. At this moment you shall receive the following DIALER.CALL_STATUS events in this chronological order:

{
  "type": "DIALER.CALL_STATUS",
  "payload": {
    "flow": "concurrent",
    "status": "hanging"
  }
}

{
  "type": "DIALER.CALL_STATUS",
  "payload": {
    "flow": "regular",
    "status": "connected"
  }
}