Abstract: According to the present invention a method for implementing connection access authorization between a first entity and a second entity in a communication system comprising at least one closed user group is disclosed. The method comprises the steps of storing a table (DB3) of special identifications for an entity belonging to a closed user group, receiving a connection request, a) checking (12) whether the connection is within a closed user group, b) checking (13) whether all connections across the border of the closed user groups of both the first and the second entities are allowed, c) checking (14) whether the first entity belongs to the table (DB3) of special identifications for the second entity, and giving connection access (15) if at least one of the conditions a, b and c is true. By this method, a rejection of a connection request is overridden in case an entity having a special identification, e.g., a subscriber having a special number, is called.

Abstract: The invention relates to a method and an arrangement against fraudulent use in a telecommunications network. The invention is based on the idea that at least one fraud profile identified by an identifier is created and the identifier is included in the subscriber data of some subscribers. Based on this identifier the fraud restriction parameters of the subscriber are retrieved from the subscriber's fraud profile, and these fraud restriction parameters are used in detecting and indicating possible fraudulent use. The fraud restriction parameters include values for different service limits, such as the maximum number of call forwarding re-quests and/or the maximum number of location updates during a certain period, and possibly at least for some features an action parameter related to a service limit and implemented when the service limit is reached.

Abstract: The invention relates to a method and an arrangement for restricting the duration of communication in a telecommunications network. The invention is based on the idea that at least one restriction table is created with restriction parameters for monitoring the duration of sub-scriber's communication on the basis of the call type and the applicability of this restriction table to individual subscribers is indicated by a status parameter in subscriber specific data. Based on the call type, such as a forwarded or mobile originated call, the correct restriction parameter is retrieved from the restriction table for those subscribers for whom the status parameter is set “on” and the limiting value included in the restriction parameter is used in detecting and indicating calls of long duration. In one embodiment of the invention the restriction parameters are created to apply on the basis of call type and call direction.

Abstract: The invention relates to a method and an arrangement against fraudulent use in a telecommunications network. The invention is based on the idea that at least one fraud profile identified by an identifier is created and the identifier is included in the subscriber data of some subscribers. Based on this identifier the fraud restriction parameters of the subscriber are retrieved from the subscriber's fraud profile, and these fraud restriction parameters are used in detecting and indicating possible fraudulent use. The fraud restriction parameters include values for different service limits, such as the maximum number of call forwarding re-quests and/or the maximum number of location updates during a certain period, and possibly at least for some features an action parameter related to a service limit and implemented when the service limit is reached.

Abstract: The invention relates to a method and an arrangement for restricting the duration of communication in a telecommunications network. The invention is based on the idea that at least one restriction table is created with restriction parameters for monitoring the duration of sub-scriber's communication on the basis of the call type and the applicability of this restriction table to individual subscribers is indicated by a status parameter in subscriber specific data. Based on the call type, such as a forwarded or mobile originated call, the correct restriction parameter is retrieved from the restriction table for those subscribers for whom the status parameter is set “on” and the limiting value included in the restriction parameter is used in detecting and indicating calls of long duration. In one embodiment of the invention the restriction parameters are created to apply on the basis of call type and call direction.