asterisk users - Jun 2008 - connectivity with oracle database and astreisk

Hi all

In my company there is oracle database which has the information about 
the client. Now my requirement is... when my clients calls to our 
company .. they should be able to get information about them when they 
call to our pbx. I mean how can  reterive information from oracle 
database and play it to clients .

Thanks in advance

Bikrish