I have a BCM 50 and currently not using AA. I want to have a greeting for when I step away from the office and a night greeting saying I'm closed.(after hours) I want to use the feature 871(manual mode). I setup 2 different greetings and also setup a lunch and night in ring groups. How do I trigger each greeting when I select them? Will it still follow the schedule in the BCM and the schedule in voicemail?