Calls made from a visited telephone can be processed by either the home server or the visited server. Which server processes the call depends on how the user originates the call. The home server processes any calls that are a result of a user depressing one of the buttons that were downloaded to the visited telephone. The visited server processes any calls that are placed on the visited telephone using the dial pad.

All emergency numbers must originate from the dial pad of the visited telephone to ensure that the locally applicable emergency number entered on the key pad is sent to the emergency call receipt agency. A visited telephone will be deactivated when an emergency number is dialed. The visited server determines if the call is an emergency through the Automatic Routing Selection (ARS) analysis table category of the called number. Deactivating the visited telephone gives the emergency call receipt agency the ability to make a call back to the telephone if necessary. After a visitor makes emergency call of the type emer or alrt, the EMU feature does not support use of EMU FAC for registration for an amount of time that can be administered.