T/EE = timed exit or final door terminate. final door means setting will complete when the final door is closed on leaving
ET = exit terminate. Push to set button. Wont set till its pressed
EE = final door
Entry 1 normal entry time, on expiry entry 2 time will start but will give an internal alarm. At the expiry of timer 2 full alarm (Bells and comms)
I dont know but id assume it will fire the external bells when disarmed if on. Default would be internal alarm only for tampers if disarmed