Luz,
Yes, this is possible with Asterisk. You probably already have a
database system with predictive numbers to call, so you'll need some
development to talk to that.
For the Asterisk servers, this depends on quite a few factors such as
what phones you're using, what database you're talking
Two of these in ten minutes?
1. Read about Digium and Asterisk and decide. You found this list. Did
you find the Digium site and the Wiki?
2. Google site:lists.digium.com or look on the Wiki. Hardware
recommendations are covered repeatedly.
3. Again, did you go to Digium? Look at their