Dial Rules


I have a question regarding dial rules.

I’d like to have a dial rule, that covers all calls to numbers with mor the 2 digits (internal calls) for external calls.
At the moment I have a rule that just removes the 0 that I use for dialing outigoing calls.

What i want is, that I don’t have to dial an extra 0 before the number, when I want to call outside.

Could anybody give me a hint, how to solve this?