The invention relates to the administration of telephony applications, which conventionally uses domain controller-based access authorization methods. The aim of the invention is to provide a method which allows to eliminate the need for these methods. In a network (N) in which terminal devices (EG) are connected to time division multiplexed or packet-oriented network components (PBX, LAN), a terminal device (EG) establishes a communication link (k) to a terminal device-specific adaptation for telephony applications (TSP) via an interface for telephony applications (TAPI), and the authorization for importing data (d) is verified. The data (d) are imported via the communication link (k) to affected applications (AP) or affected services (D) of the network (N). The invention is advantageousin that any terminal device (EG) can be used to import the data (d) and that no special authorizations are required for access as the proprietary/license keys that are exchanged between the terminal device and the exchange and the domain controller (DC) provide an excellent protection from unauthorized access to the exchange and to the local network connected thereto. For accessing the exchange (PBX) and the domain controller (DC), only one authorization check method, namely that of the exchange (PBX) is required.