Enabling International Dialing

Hello all! Please excuse the newbie question - I did research the topic quite a bit before asking it here, but could not find a clear and concise answer.

Out of the box installation apparently does not support international dialing (attempting to dial stationed soldiers in Afghanistan so their family can speak with them at the lowest possible rate with Google Voice).

I have tried MANY variations of dialing - including: 0119377309xxxx, 9377309xxxx, 119377309xxxx with no luck.

What do I need to do to enable international calling on a fresh install of FreePBX? I would like to enable all countries as they are stationed just about everywhere!

THANK YOU THANK YOU THANK YOU for your help :wink: