Calls

How to filter calls? What is the 'status' of calls? What is a call 'attempt' ? What is a 'picked up' call? What is a 'missed' call? What is a 'dropped' call? How can I see the customer's data of each call? What happens when I reach the limit of my plan? How can I see the call 'ratio' of each call button? How to export my calls data?