Siemens Aktiengesellschaft

Frank Hollatz

Alfred Jugel

Thomas Lange

Andreas Lindenthal

Umesh Bhavsar

Joachim Ungruh

Christian Schmidt

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.

Growing community of inventors

Munich, Germany

Frank Hollatz