Abstract: In order to provide end users with an individualized electronic program guide, a plurality of client devices is connected to a back end system. Each client device is operable by an end user. User information, which is related to content of at least one end user is collected. Individual preferences content preferences of one or several end users is determined. Taking into account the determined content preferences of the end user, the individualized program guide is generated. The individualized program guide is then made available to the client device of the respective end user.

Abstract: Data are transmitted in a telecommunications system from a first private branch exchange to a second private branch exchange. The data include wanted data, for example voice information, and control data for controlling a private branch exchange. The control data include information about service attributes of the private branch exchanges. The data are interchanged in the form of data packets via a computer network.