Please go through the Tutorial.
Setting up a Smart Call (Dial Plan)
Click the Dial Plan link when you are Logged in, and select ADD.
You can try the following entries :
Priority: Enter priority number based on existing plan, to set numerical oredr
Pattern: _00ZXXXXXXXXX.
Comment: [Optional, Eg. "Plan to call in format 00+CC+Number"]
Replacement:011${EXTEN:2}
Provider: [Pick the appropriate provider from your provider list]
Active: Yes
ENUM Lookup:No or if Yes / Replacement = ${EXTEN:2}
Geographic Look Up: [Optional, usually I start with No]
This plan takes the dialled number, removes the first 2 characters if it matches the pattern string (00+CC+Number with 11 or more digits), adds 011 at the front, and sends the output to your provider to set up the call.
Hope this helps.