AT&T Partner II - Manual (Page 68)

International Long Distance. To prevent international calls, enter the
■
international prefix numbers, [ 0 ] [ 1 ] [ 1 ].
You can also use Allowed List entries to override numbers that would otherwise
be disallowed. For example, if you wish to allow calls to a specific 900 number
(such as a technical support number), put the number in an Allowed List:
List 1 (Toll Call Prefix required)
■
19005559999
09005559999
■ List 2 (Toll Call Prefix not required)
9005559999
Summary of Equipment Dialing Restrictions
Table 4-5 summarizes the equipment dialing restrictions and permissions,
showing how they can be combined in a variety of ways to customize an
extension’s dialing privileges. This table assumes that at least one Centrex line
is assigned to the extension for which you are creating dialing restrictions.
4-20 Customizing Your System