public enum ConnectionStatus| Undefined | 0 | status of connection is not defined. object is broken |
| Dialing | 1 | Connection is initiated by the owner object but not accepted yet |
| Ringing | 2 | Connection is initiated by other participant |
| Connected | 3 | connection is established |
| Hold | 4 | Connection is put on hold by owner |
| Held | 5 | Connection is put on hold by other party |