Hello, we want to use one 3cx to our several subsidiaries. Problem is, that in this subsidiaries are same numbers. Now we chosen to every subsidiaries one number as first number in phone number For example 1 for Berlin, 2 for Paris, 3 for Prague Now we have internal Numbers in format 1xxx (Berlin), 2xxx (Paris), 3xxx Ist it possible to make any rule, to change internal dialed number? Because people want dial only xxx inside subsidiary (3 numbers). For example: If user from Berlin dial xxx, 3cx change this number to 1xxx. If user from Berlin dial 2xxx, 3cx make nothing. This rule must check Group (Berlin, Paris, ...) and lenght of dialed number if is only 3. If is this ok, then must add 1 or 2 or 3 and dial this number internal.