Abstract: A collector wire network for communicating locally fixed system parts having at least one variable-location system part, wherein data transmission devices are each assigned a reception range, where the reception range is mapped onto a section that results from a length of a collector wire segment plus a first overlap length and a second overlap length, the data transmission device connected to the respective collector wire segment is configured such that a level of the data signal transmitted thereby is matched to a respective reception range such that, because of attenuation of the level, caused by line damping along the first and second conductors and the coupling elements, the level in a receiving device of a variable-location system part which is located outside the reception range no longer recognized as a valid signal.

Abstract: A collector wire network for communicating locally fixed system parts having at least one variable-location system part, wherein data transmission devices are each assigned a reception range, where the reception range is mapped onto a section that results from a length of a collector wire segment plus a first overlap length and a second overlap length, the data transmission device connected to the respective collector wire segment is configured such that a level of the data signal transmitted thereby is matched to a respective reception range such that, because of attenuation of the level, caused by line damping along the first and second conductors and the coupling elements, the level in a receiving device of a variable-location system part which is located outside the reception range no longer recognized as a valid signal.

Abstract: A network, in particular an Ethernet network, contains as network elements at least two network components that are interconnected by a network transmission line. Accordingly, at least one expansion unit having two external ports is disposed in the network line for extending the scope thereof, wherein the expansion unit forwards a failure of the network transmission line at one of the ports thereof to a port of the next subsequent network element.

Abstract: A network, in particular an Ethernet network, contains as network elements at least two network components that are interconnected by a network transmission line. Accordingly, at least one expansion unit having two external ports is disposed in the network line for extending the scope thereof, wherein the expansion unit forwards a failure of the network transmission line at one of the ports thereof to a port of the next subsequent network element.