Once phones have outbound dialing locked down it often becomes necessary to provide occasional exceptions. Since release 5.0, it has been possible for a privileged User (Receptionist for example) to transfer secondary dial tone to a restricted user to allow them to make a call that they would not otherwise be able to make.

A more versatile solution is to use Authorization Codes. Authorization Codes permit a user with a Code to go to a restricted phone and make a call with their privileges without the necessity of Hot Desking for the call. This is sometimes called "Roaming Class of Service" on other systems. For information see the field descriptions for the Manager Authorization Codes tab in Administering Avaya IP Office™ Platform with Manager.

Note that Emergency Calls are always permitted, hence the need to ensure Emergency Dialing has been correctly defined.