as I saw, for North America dial plan, on IOS, the default subscriber is 7 digits, national is 10 digits, not sure how many digits for International
my question is, can I change the subscriber digits from 7 to 10? also possibly change the national from 10 to 11 (with the 1 at beginning), therefore, when the incoming call hit the PRI, I can do some manipulation on the H323 or MGCP gateway for the incoming (calling) number
Thanks