Signal transmission device e.g. for data transmission in telephone networks, has transmission unit operating via part-unit of symmetrical and of asymmetrical transmission systems

摘要

A signal transmission device having two transmission units using one electrical cable with at least two cores. A transmission unit operates via a part-unit of a symmetrical transmission system and of an asymmetrical transmission system with pronounced transmission- and reception-impedances. The complete transmission unit functions via a logic control mechanism, and one part-unit can be connected to the transmitting conductor cores.