Abstract: For directory services for telecommunication, a data network, a terminal connected to the data network, at least one database in the data network, and a device for interactive communication between the terminal and the network regarding the database are provided. The database includes catalogue data regarding subject information about persons/families/companies, so that catalogue searches using different search criteria can be done. The desired information and adequate search criteria may be asked for from the terminal. The search is performed, and the desired catalogue data is presented visually on a display of the terminal asking for the subject information. The device also includes a reliable database outside the network, accessible and changeable only by admitted operating staff devices, and a transmitter for transmitting information from the reliable database to at least a reliable part of the database inside the network.

Abstract: A user of a telephone service selects the quality level of a connection by manually specifying the desired quality level, automatically setting up the call with the specified quality level. To assist the user when selecting the quality, a voice sample of the user or a pre-recorded voice sample with specified quality levels may be played back to the user as a reference before the selection of a quality level. Alternatively, the user may be informed about transmission parameters associated with specified quality levels before the selection of a quality level. The method may be carried out by a service control point and a service switching point in a telecommunication network.