The predefined restriction tables in Cisco Unity do not block calls to the international operator. Customers may expect that since direct dial international calls are blocked, it is not possible for users to forward calls to international numbers, but the loophole of the international operator is still allowed under the predefined restriction table. This subversion can be accomplished by anyone inside or outside of a company who is familiar with how to configure Cisco Unity and has access to a valid system username and password, which is further compounded by the common existence of the Example Administrator and Example Subscriber accounts in many installations.
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