Method of providing call charge information as well as service control facility, subscriber terminal exchange, terminal, and communication network

A method of informing a subscriber (A) in a communication network (KN) about the charge for a desired connection wherein a call request specifying the desired connection and a request for tariff data (T) are signalled by the subscriber (A) via a terminal (TA) to the communication network (KN) by dialing a number (N), characterized in that tariff data (T) relating to the charge for the desired connection is determined independently of the establishment of the desired connection, and that the tariff data (T) is sent to the terminal (TA) before the desired connection is established, and further characterized in that the call request is directed to a service of the communication network (KN) which determines the tariff data (T) without connecting the subscriber (A) to a billing system of the communication network (KN), wherein the communication network (KN) further comprises a service control facility (SCP) and a switching facility (SSP1, SSP2) for transmitting the call request to the service control facility (SCP) and for receiving in response from the service control facility (SCP) instructions which concern a further treatment of the desired connection, and wherein the call number (N) includes a service identifying number (S) to identify a service provided by the service control facility (SCP) in order for the call request with the call number (N) to be routed in accordance with the service identifying number (S) to the switching facility (SSP1, SSP2).