Service-specific treatment of a call request in terms of the called subscriber line

For the recognition of a teleservice when establishing a call in a telephone network from a calling party to a target subscriber, on the basis of the call request, in an exchange of the network, preferably a target exchange assigned to the target subscriber, a signal identifier is temporarily applied to the requested call, for a duration that is at least sufficient for the calling party to send out a service call signal that indicates a teleservice. If a service call signal was received by the signal identification, this signal is evaluated with regard to the indicated service, and further handling of the call is carried out as a function of the service indicated in this manner.