About numbering plan may be you need ARS/AAR Administration
To place calls, set ARS to ON for CO phone calls. You should also to check all ARS/AAR defaults. All default ARS analysis codes are deleted before dialed strings are added for routing when DEFINITY is installed outside of North America. Be aware that the default for the 10 digits cause
dialing problems.
Lucent recommends only the following call types be used outside North America:
int: For all international numbers.
natl: For all national PN numbers.
pubu: For all other external (that is, not extensions) numbers.