International call HELP

Hello guys, i am new to asterix and freepbx community. I just have a small problem.
I want to make internation calls within EUROPE to other countrys in EUROPE using the prefix 00. I need to know what i must modify in TRUNK dialing rules and OUTBOUND ROUTES dialing patterns.

Just tell me the the right configuration that enables me to dial from my phone the next number 00(prefix)44(countrycode)1234512345

Thank you and i wait for your reply guys.