I am monitoring event callbacks of CallControlTerminalConnectionListenerAdapter and want to detect specific cause of CallControlConnectionEvent, i.e. CAUSE_CALL_PICKUP and CAUSE_UNHOLD.
Currently every time when event callback is called, I output cause logs got from CallControlConnectionEvent.getCallControlCause(). However I have seen neither of CallControlConnectionEvent.CAUSE_CALL_PICKUP and CallControlConnectionEvent.CAUSE_UNHOLD.
1)Can I get the cause of either CallControlConnectionEvent.CAUSE_CALL_PICKUP or CallControlConnectionEvent.CAUSE_UNHOLD in any callback method?
2)If YES in my question 1) above, please let me know the actual operation flow / procedure / conditions (such as consult transfer operation etc.) to generate these specific cause.
Thank you for your help in advance.