Is there a feature in Asterisk to deal with pre paid minutes?
For example a user may buy 500 minutes to call into a service, when the mins run out the call is dropped?
if two callers dial in they only have 250 mins each or a proportion of what is left depending on when they dial in?
What tools do I have available?
Is it just a case ow referencing a database and updating it on exit? This potentially means a user may get more minutes than they have credit for as the database is only updated at the end.