Use the command "list cor"; hopefully the ones that are set up for international dialing are labeled as such. That's half the battle.
Do you have agents? An agent COR settings will override the station COR.
Are you sure that the number they are dialing is correct? I have had individuals complain that they weren't being allowed to complete an international call, but the problem was that they had an invalid or incomplete phone number. I have a handful of international test phone numbers that I can share with you, if you like.
Have the user try his international call while you are running the "list trace station XXXX" command, and see what the error message is.
Susan
“Before you criticize someone, you should walk a mile in their shoes.
Then, when you criticize them, you are a mile away ...
and you have their shoes.”