Asternic CDR Reports will let you run reports over your Asterisk PBX call detail records, but with a different twist. Instead of a big pile of unorganized records, you will see them grouped by user and call direction. You will know how many calls each of your users/extensions made or received, with call durations, ring times. There are several distribution reports: per day, week, month, day of week. There is also a detailed report that you can export or search for particular records. You also will have a link to download or listen to recordings if they are available in your system. All from your web browser, without the need to install anything on the client side.