Abstract: In a communications network, a first address information is transmitted from a first communication terminal equipment to a first switching node for setting up a communication connection, whereby first identification features are contained in the first address information. The first switching node interprets the first address information with the first identification features and derives a second address information for addressing a first address converter therefrom. At least parts of the first identification features are communicated to the first address converter. Second identification features are generated from the first identification features, said second identification features serving the purpose of addressing a second switching node. The communication connection between the first and second switching node is set up with the second identification features.

Abstract: A correspondence table is stored in a mobile switching center. In the correspondence table, at least one local area code for a geographical subarea is assigned to each authorization organization number of an authorization organization. Furthermore, a supervision file is stored in which a mobile subscriber number is entered for a mobile subscriber who is to be monitored. When an attempt is made to set up a connection from/to the mobile subscriber, the correspondence table is used to determine whether respective authorization organizations are authorized to monitor the communications link in the geographical subarea in which the mobile subscriber is located. A configuration for monitoring communications links is also provided.