How to take a centralized backup in win2k3 enterprise edition

Haiii,,
In our scenario there is 107 win2k3 R2 enterprise edition SP1. What i need is i want to take the centralized backup for all these servers. (ie one server act as a back up server)
Is there any in built utility for this in win2k3

If not there what i have to do..
Plzzz help me..