Rule based daling

Hi Matt,
I want to create rule based dialing like... if a customers' home number, mobile number, office number is present, i want to set priority for the number which to be dialed 1st then so on how can i do it.
Thanks
Vidur
I want to create rule based dialing like... if a customers' home number, mobile number, office number is present, i want to set priority for the number which to be dialed 1st then so on how can i do it.
Thanks
Vidur