Hi, I will answer your questions:
1) Yes, and also if the campaign is within the time and date settings
2) Yes, if you keep looking on the forum you will find this answer and many other, just try searching more:
http://www.elastix.org/index.php/en/com ... paing.html
3) It is not possible, this is a predictive dialer, not an automatic dialer, if there is any agent logged in, and if the capaign is still enabled and in time&date range, it will dial according to its "predictions"