APIs that result in an event when the API returns FTDM_SUCCESS

ftdm_channel_call_answer()
ftdm_channel_call_indicate()
ftdm_channel_call_transfer()
	FTDM_SIGEVENT_INDICATION_COMPLETED
	*note that FTDM_SIGEVENT_INDICATION_COMPLETED has associated data to indicate the result of the indication
	*note this event is only delivered on non-blocking channels

ftdm_call_place
	FTDM_SIGEVENT_DIALING

ftdm_channel_call_hangup
	FTDM_SIGEVENT_RELEASED

