[Kamailio-Users] CDRTool and Prepaid

[Adrian Georgescu]

The problem with concurrent prepaid calls and single balance is that  
you have to correlate between the call control and rating angine  
somehow so that all calls terminate when balnce becomes zero. The  
problem is a bit complex:

Example:

Balance = 10.
A call starts to destination XXX, for the sake of example max session  
time = 2 minutes
After one minute, you start second call to destination YYY which has a  
different price and your balance is not anymore 10 but depends on the  
duration of the first call which is in progress.

What is the maximum session time for it given that the first call is  
already in progress?
What should happen with the first call?

I am looking for suggestions on implementing a proper algorithm to  
deal with this situation in the rating engine. If you have any I would  
be glad to hear it.

Adrian