I think the feature is thru-dial.
Dial 0 and then the extension - if 0 is dialed and nothing else - the call will revert to a default dn. Thru-dial is allowed by restriction/permisson list.
Quote:
Thru-Dial
Introduction All Thru-Dial services you create using the Voice Menus
feature must be adequately protected with an appropriate
restriction/permission list.
Defining a restriction/
permission list
To define a restriction/permission list, see “Defining and
applying restriction/permission lists” on page 6-99.
Assigning a
restriction/permission
list
To assign a restriction/permission list to the Thru-Dial service,
follow these steps.
Step Action
1 Log in to the administration terminal.
2 Select Voice Administration from the Main Menu.
3 Select Voice Services Administration from the Voice
Administration menu.
4 Select Thru-Dial Definitions.
5 Position the cursor beside the definition, and press the
[SpaceBar].
6 Press [View/Modify].
7 Position the cursor beside the Restriction/Permission List field.
8 Enter the number of the restriction/permission list you want to
assign to the feature.
Note: The name of the corresponding restriction/permission list
does not appear until the cursor is off the field.
9 Do you want to save your changes?
IF THEN press
yes [Save].
no [Cancel]. |