I would like to check if the called number contains a country code, if not then one should be added. I've got a variable in my user's XML file called country_code containing +44. This is my code so far, however, I think the last to conditions overlap: <condition field="destination_number" expression="^(\+\d{3,20})$"> <action application="export" data="dialed_extension=$1"/> </condition> <condition field="destination_number" expression="^00(\d{3,20})$"> <action application="export" data="dialed_extension=+$1"/> </condition> <condition field="destination_number" expression="^(\d{3,20})$"> <action application="export" data="dialed_extension=${country_code}$1"/> </condition> I would like to change 00 to +, and if no + is on the number then use country_code from the user. If it does contain a +, then just use the dialled number.