Siemens Aktiengesellschaft

Siemens Aktiengesell Schaft

Unify Gmbh Co. Kg

Siemens Enterprise Communications Gmbh & Co. Kg

Bernd Hinz

Bruno Bozionek

Ralf Neuhaus

Rainer Zimmermann

Rainer Uecker

Christian Scheering

Thorsten Laux

Stefan Berndt

Thomas Hanna

For alternate operation of a terminal (EG) at at least two communication nodes (GK, GK), the terminal (EG) is first registered with a first of the communication nodes (GK). In this case, registration is followed by there being a logical connection between the terminal (EG) and the first communication node (GK). The obtainability of the first communication node (GK) is monitored, and in the event of the first communication node (GK) being unobtainable a status information item relating to the unobtainability is produced, and the status information item is taken as a basis for setting up a logical connection between the terminal (EG) and the second communication node (GK). The terminal (EG) is then automatically operated at the second communication node (GK).

Method and communication arrangement for alternately operating a terminal at at least two communication nodes

In order to operate a communication terminal for packet-oriented data transmission, at least one piece of status information is stored, for a communication terminal, in a memory unit associated with the communication terminal. Said status information is provided with a digital signature that is calculated from the status information by means of a private key for an asymmetrical encoding method associated with a first control unit associated with the communication terminal, for the resolution and/or conversion of network addresses. If the first control unit fails, a request is transmitted comprising the status information and the digital signature to associate the communication terminal with at least one second control unit, and the digital signature is checked. In the event of a positive check result, the communication terminal is associated with the second control unit.

Method and control program for operating a communication terminal for packet-oriented data transmission

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Rheda-Wiedenbrück, Germany

Bernd Hinz