If you have no restrictions at all at the moment (COR 1 everywhere), then the restrictions will have to be built in ARS before you can apply them... this should not be attempted by someone untrained or at least very familiar with ARS programming, if done incorrectly it could cause all outbound calls to fail or be mis-routed, and if you are in a networked environment this could mess with your clustering as well. I would recommend contacting your vendor at least for the initial setup of toll restriction.