it does do automatic account management..
basically, if you set up a prepaid account for a person, add $100 to thier account, they start making calls, the balance gets checked before the start of every call, and deducted from every minute/second or whatever. each user can also log in web-based and check thier current balance, view a CDR for thier account ( last 500 calls ) and add funds through the online account management page that accepts credit cards and deposits funds direct into your merchant account.