Telephone Call Allocation Software

Our company runs a standard call logging software on our PABX. This produces reports on calls made by each extension and can give duration,called number,date, time, etc

There is a need to go one step further and for each extension, get from the user, the business and private calls.

Currently, all this information is printed for each extension and the user is asked to indicate on the paper, which are the business and which are the private calls.(The user is then billed for personal calls above a certain figure)

I've been asked to automate this process as it is very labour intensive, prone to errors and wastes a lot of paper and printer.

Has anyone else come across any sofware that can solve this problem. All help will be most appreciated.(Output can be obtained as a text file)