| Enumerator | 
|---|
| EXOSIP_REGISTRATION_SUCCESS | user is successfully registred. 
 | 
| EXOSIP_REGISTRATION_FAILURE | user is not registred. 
 | 
| EXOSIP_CALL_INVITE | announce a new call 
 | 
| EXOSIP_CALL_REINVITE | announce a new INVITE within call 
 | 
| EXOSIP_CALL_NOANSWER | announce no answer within the timeout  | 
| EXOSIP_CALL_PROCEEDING | announce processing by a remote app 
 | 
| EXOSIP_CALL_RINGING | announce ringback 
 | 
| EXOSIP_CALL_ANSWERED | announce start of call 
 | 
| EXOSIP_CALL_REDIRECTED | announce a redirection 
 | 
| EXOSIP_CALL_REQUESTFAILURE | announce a request failure 
 | 
| EXOSIP_CALL_SERVERFAILURE | announce a server failure 
 | 
| EXOSIP_CALL_GLOBALFAILURE | announce a global failure 
 | 
| EXOSIP_CALL_ACK | ACK received for 200ok to INVITE 
 | 
| EXOSIP_CALL_CANCELLED | announce that call has been cancelled  | 
| EXOSIP_CALL_MESSAGE_NEW | announce new incoming request.  | 
| EXOSIP_CALL_MESSAGE_PROCEEDING | announce a 1xx for request.  | 
| EXOSIP_CALL_MESSAGE_ANSWERED | announce a 200ok 
 | 
| EXOSIP_CALL_MESSAGE_REDIRECTED | announce a failure.  | 
| EXOSIP_CALL_MESSAGE_REQUESTFAILURE | announce a failure.  | 
| EXOSIP_CALL_MESSAGE_SERVERFAILURE | announce a failure.  | 
| EXOSIP_CALL_MESSAGE_GLOBALFAILURE | announce a failure.  | 
| EXOSIP_CALL_CLOSED | a BYE was received for this call 
 | 
| EXOSIP_CALL_RELEASED | call context is cleared. 
 | 
| EXOSIP_MESSAGE_NEW | announce new incoming request.  | 
| EXOSIP_MESSAGE_PROCEEDING | announce a 1xx for request.  | 
| EXOSIP_MESSAGE_ANSWERED | announce a 200ok 
 | 
| EXOSIP_MESSAGE_REDIRECTED | announce a failure.  | 
| EXOSIP_MESSAGE_REQUESTFAILURE | announce a failure.  | 
| EXOSIP_MESSAGE_SERVERFAILURE | announce a failure.  | 
| EXOSIP_MESSAGE_GLOBALFAILURE | announce a failure.  | 
| EXOSIP_SUBSCRIPTION_NOANSWER | announce no answer 
 | 
| EXOSIP_SUBSCRIPTION_PROCEEDING | announce a 1xx 
 | 
| EXOSIP_SUBSCRIPTION_ANSWERED | announce a 200ok 
 | 
| EXOSIP_SUBSCRIPTION_REDIRECTED | announce a redirection 
 | 
| EXOSIP_SUBSCRIPTION_REQUESTFAILURE | announce a request failure 
 | 
| EXOSIP_SUBSCRIPTION_SERVERFAILURE | announce a server failure 
 | 
| EXOSIP_SUBSCRIPTION_GLOBALFAILURE | announce a global failure 
 | 
| EXOSIP_SUBSCRIPTION_NOTIFY | announce new NOTIFY request 
 | 
| EXOSIP_IN_SUBSCRIPTION_NEW | announce new incoming SUBSCRIBE/REFER.  | 
| EXOSIP_NOTIFICATION_NOANSWER | announce no answer 
 | 
| EXOSIP_NOTIFICATION_PROCEEDING | announce a 1xx 
 | 
| EXOSIP_NOTIFICATION_ANSWERED | announce a 200ok 
 | 
| EXOSIP_NOTIFICATION_REDIRECTED | announce a redirection 
 | 
| EXOSIP_NOTIFICATION_REQUESTFAILURE | announce a request failure 
 | 
| EXOSIP_NOTIFICATION_SERVERFAILURE | announce a server failure 
 | 
| EXOSIP_NOTIFICATION_GLOBALFAILURE | announce a global failure 
 | 
| EXOSIP_EVENT_COUNT | MAX number of events 
 |