Data processing/transfer device and data end device for a line-switched network and packet-switched network

A data processing / data transmission device and data transmission device for a circuit-switched network and packet-switched network In a data processing / data transmission device and a data transmission device for a circuit-switched and packet-switched network, the logical separation between applications based on the circuit-switched network, eg PSTN, ISDN, and applications based on the packet-switched network, eg Internet, To be able to repeal, has the designated as data processing / data transmission device, universally applicable device (DVÜG) for the automatic processing of data and for sending and receiving data both in the packet-switched or from the packet-switched network (PVN) as well as in the circuit-switched or from the circuit-switched network (LVN),which is connectable both to the packet-switched network (PVN) and to the circuit-switched network (LVN) and to which at least one data terminal device (DEE) for transmitting and receiving data in the circuit-switched or circuit-switched network (LVN) is assigned or assignable controllable switching means (USM2) controllable such that the data terminal (DEE) connected to the circuit-switched network (LVN) in a first mode of operation for transmitting and receiving data via the data processing / data transmission device (DVÜG), from the first operating mode to a second operating mode in which the data terminal device (DTE) for transmitting and receiving data is connected to the packet-switched network (PVN) via the data processing / data transmission device (DVÜG),is switchable and vice versa.