It appears Anveo wants numbers dialed as country code + area + number. If that's the case, US/Canada calls should work fine, but international calls will need the 011 stripped off:
Service Providers -> ITSP Profile B -> General -> DigitMap:
(1xxxxxxxxxx|<1>[2-9]xxxxxxxxx|<1aaa>[2-9]xxxxxx|<011:>xx.|(Mipd)|[^*#]@@.'@'@@.)
where aaa is your local area code.