Patent ID: 8331918

Claim:
A method for cost-effective redirecting of calls in which, utilizing a service for the call redirection, calls destined for a first terminal of a subscriber are redirected to a second, alternative terminal of the subscriber according to the principle of call redirection, comprising: following activation of a corresponding call redirection function via a service telephone number, redirecting a call that originates from a terminal of a first subscriber and is destined for a first terminal of a second subscriber, to a second, alternative terminal of the subscriber whenever it is detected that a network-crossing connection setup between the terminal of the first subscriber and the first terminal of the second subscriber is required to establish the desired connection of the first subscriber, the call redirection function allowing a call redirection only to a second terminal of the second subscriber that can be assigned to the same communications network as the terminal of the first subscriber from which the call originates, so that, in a successful setup of the connection, the communication between the first subscriber and the second subscriber is conducted exclusively via one communications network, and, in every successful setup of a call, the communication data records generated in connection with the call are recorded and analyzed in the processing system of the billing services to determine the saved network interworking costs, the second subscriber being allocated a freely specifiable portion of the determined saved network interworking costs.