There are a numberof routes you can take,
1.) Use SQL to export the data from the CDR database on the Publisher to another application (e.g. Excel). I wouldn't really reccomend doing this unless you are VERY experienced at both understanding Call Manager CDR logs and DATA Analysys.
2.) Use the CAR (ART) Tools that ship with call manager 3.3 (or can be downloaded for 3.0-3.2), These give basic call proccessing information and some quite useful reports and best of all it's free.
3.) Buy a 3rd party app from someone such as Tiger / Avotus / Mind etc. etc.. Who will be able to provide you with fully cusomisable reporting to your hearts content.
That's one of the many good things about Call manager, it's so flexible and (to quote the Sex Pistols) there are many ways to get what you want. (Anarchy in the UK - 1977)
Paul