Each disallowed list contains external telephone numbers that users who are assigned to the list cannot dial. There are eight lists, each containing up to 10 numbers. Each number can use the telephone dialing digits 0 to 9, *, # and can be up to 28 digits long. You can also use the ? character as a single digit wildcard.
Numbers in the disallowed lists of which a user is a member are overridden if they also appear in the allowed numbers lists, emergency number list of which the user is a member and also by marked system speed dials.
To Edit an Disallowed Numbers List
1.From the menu bar, click on User.
2.The Outgoing Calls panel next to the list of users gives a summary of the currently configured lists. Click on the 
edit icon.
3.From the List Management table, select the View Details link of the list that you want to edit.
•The Telephone Numbers in List panel displays the allowed numbers. Edit the numbers as required.
•The Assign Users to List panel is used to set which users are assigned to the list.
4.When completed click Save.
5.To access another list click on << Previous List or Next List >>. Alternatively click on << Back to return to the table of all the lists.