Abstract: A process and device are disclosed for playing back multimedia data in a motor vehicle. A digital multiplexed audio-video data stream from a multimedia data carrier, in particular a DVD, is read and separated into an audio data stream, a video data stream and a menu data stream. The audio data stream is converted into an audio signal which can be acoustically output and is output by an acoustic output unit. The video data stream and the menu data stream are combined into a digital graphic data stream which is blanked out when the motor vehicle is in movement. The graphic data stream is converted into a graphic signal which can be graphically output and is output by a graphic output unit. This ensures that the menu data are displayed even when the vehicle is in movement, so that the multimedia data carrier remains constantly useable.

Abstract: A process and device are disclosed for playing back multimedia data in a motor vehicle. A digital multiplexed audio-video data stream from a multimedia data carrier, in particular a DVD, is read and separated into an audio data stream, a video data stream and a menu data stream. The audio data stream is converted into an audio signal which can be acoustically output and is output by an acoustic output unit. The video data stream and the menu data stream are combined into a digital graphic data stream which is blanked out when the motor vehicle is in movement. The graphic data stream is converted into a graphic signal which can be graphically output and is output by a graphic output unit. This ensures that the menu data are displayed even when the vehicle is in movement, so that the multimedia data carrier remains constantly useable.

Abstract: Telephone calls are handled via the Internet between an interworking unit relating to the calling subscriber and an interworking unit relating to the called subscriber. At least the telecommunications network to which the calling subscriber belongs as well as the interworking units are operated by the same provider. Access by a calling subscriber to the interworking unit and the passing on of the dialed telephone number of the called subscriber to the interworking unit are made dependent on the identification of the call as an Internet telephone call and dependent on the result of an access authorization check. Charging for use of the telephone network and of the Internet for such a call does not commence until the connection is made, as in the case of a call which uses only the telephone network.

Abstract: The invention enables a telephone subscriber to be advised via his telephone line of the arrival of a new e-mail. This is achieved by the e-mail server informing the point of presence (POP) of a subscriber to the Internet of the presence of mail, the POP passing this information to the local exchange of the subscriber, which in turn informs the subscriber of the presence of mail.

Abstract: When an analog telephone subscriber is in an Internet session via a modem connection, he cannot be reached by telephone. The invention enables a message about a telephone service incoming during the Internet session.