CALLING SUBSCRIBER VALIDATION

摘要

The invention relates to calling subscriber validation in a telecommunications system which is divided into networks governed by at least two different operators and in which at least some of the subscribers connected to the network of a given operator also have access to the network of a neighbouring operator through the network of the given operator. To enable the validation to be carried out economically and with maximum utilization of the network transmission capacity, the network of the neighbouring operator uses a given predetermined node (SW4') for calling subscriber validation, and the connection setup process is continued in the network of the neighbouring operator from an inter-network link up to the predetermined node in which validation is performed in the connection setup phase. When the validation gives a positive result (a) the already established connection is released backwards from the predetermined node up to a given predetermined exchange, and (b) redirection of the call to the desired destination is performed from the predetermined exchange.