1) For the Minimum Extension Length, select the number from the drop-down list.
When you increase the group's minimum extension length, any assigned extensions are automatically modified to match the new minimum length. Modifications are based on the following
> If the user's directory number (DN) is sufficiently long, then DN digits are used to lengthen the extension.
> If the user has no DN or the length of the DN is shorter than the new minimum, zeros are added to the beginning of the extension.
If the resulting extension is in conflict with an existing extension, the extension is not assigned. A counter is incremented and the number of unassigned extensions is communicated to the
administrator at the end of the modification.
2) For the Maximum Extension Length, select the number from the drop-down list.
You can decrease the maximum extension length down to the number of digits of the longest assigned extension and increase the maximum extension length up to the system maximum.
Modifying the maximum extension length has no impact on the existing extensions.
3) For the Default Extension Length, select the number from the drop-down list.
This default value is constrained by the minimum and maximum values for the group.
The default number of digits determines the number of digits from the user’s DN used as an extension when the extension is automatically created.
4) Click OK to save changes.