Enumeration causes

ADDRESS_INCOMPLETE = "Address Incomplete"

AUTHENTICATION_ERROR = "Authentication Error"

BAD_MEDIA_DESCRIPTION = "Bad Media Description"

BUSY = "Busy"

BYE = "Terminated"

CANCELED = "Canceled"

CONNECTION_ERROR = "Connection Error"

DIALOG_ERROR = "Dialog Error"

EXPIRES = "Expires"

INCOMPATIBLE_SDP = "Incompatible SDP"

INTERNAL_ERROR = "Internal Error"

MISSING_SDP = "Missing SDP"

NOT_FOUND = "Not Found"

NO_ACK = "No ACK"

NO_ANSWER = "No Answer"

REDIRECTED = "Redirected"

REJECTED = "Rejected"

REQUEST_TIMEOUT = "Request Timeout"

RTP_TIMEOUT = "RTP Timeout"

SIP_FAILURE_CODE = "SIP Failure Code"

UNAVAILABLE = "Unavailable"

USER_DENIED_MEDIA_ACCESS = "User Denied Media Access"

WEBRTC_ERROR = "WebRTC Error"