Patent ID: 7715364

Claim:
A system for data transmission and data reception in a circuit-switched network and a packet-switched network, comprising: a) a data transmission device operable to be coupled with the circuit-switched network, to send and receive data to or from the circuit-switched network and to be assigned to a data processing device, b) the data processing device operable to be assigned to the packet-switched network and being universally operable to automatically process data as well as to send and receive data to or from the packet-switched network, c) at least one data terminal device assigned to said data transmission device and operable to send and receive data to or from the circuit-switched network and to or from the packet-switched network, d) wherein the data transmission device comprises switching means operable to be controlled such that the data terminal device, which in a first operating mode for sending and receiving data via the data transmission device is coupled with the circuit-switched network, is operable to be switched from the first operating mode into a second operating mode, in which the data terminal device for sending and receiving data via the data transmission device and the data processing device is coupled with the packet-switched network, and vice versa, e) wherein the data transmission device comprises first switchover control means and the data processing device comprises second switchover control means, and wherein the first switchover control means, the second switchover control means, the switching means, and control means of the data terminal device form a functional unit, wherein: the control means are operable to signal a change of an operating mode, if the terminal device is currently operating in a first operating mode, to the first switchover control means in the data transmission device or, if the data terminal device is currently in the second operating mode, to the second switchover control means in the data processing device, the first switchover control means in the data transmission device are operable to signal the change of operating mode to the second switchover control means in the data processing device, and the second switchover control means in the data processing device are operable to signal to the first switchover control means in the data transmission device to control a change of operating mode from the second operating mode to the first operating mode, and the first switchover control means in the data transmission device are operable to control the switching means for a change of operating mode from the first operating mode to the second operating mode.