[USR-TC] need to see area code + phone number for dnis info

ok, i want to be able to see the full phone number including the area code when i get a list of incoming numbers dialed. right now it only shows me the ###-#### i found a setting under call control options that lists the dnis incoming call digits which sounds promising but the default setting is 0 and i don't want to break anything. is this where i would change that and what would i put for the number? i am trying to do this to keep track of how many people are calling in from a couple of new area codes that we just added service in. thank you. matthew