If the primary telephone is locked, the visited telephone cannot place outgoing calls using the Abbreviated Dial buttons or the Bridged Appearance buttons. Calls from the Abbreviated Dial buttons or the Bridged Appearance buttons are processed by the home server. The home server blocks any outgoing calls from a locked telephone.

A visited telephone can make outgoing calls if the dial pad is used. Calls from the dial pad of a visited telephone are processed from the visited server. The visited server does not know about the lock on the primary telephone.