Abstract: A network contains a main pipe, a branch pipe leading to the main pipe, an electric data line laid in the main pipe and one laid in the individual connecting pipe, one central data distribution unit and a terminal unit. A data line is introduced into the main pipe and is connected to the data distribution unit, its other end laid in the system of pipes being configured as a transmitting or receive antenna. An additional data line is introduced into the system of pipes via the individual connecting pipe and is connected to the terminal unit with one end and another end is configured as a transmitting or receive antenna. The transmitting or receive antenna of the data line serving as an antenna and the transmitting or receive antenna of the additional data line form a pair of antennas between the antennas of which a radio link exists.

Abstract: A collar with a collar body for laying cables in pipe systems. A first section of a guide part, which is formed by a pipe and has a guide opening for a cable, adjoins a subregion of a circumferential edge of the collar body. The guide part is bent by way of a further section, which continues the first section, into the interior of the collar body, in particular towards the inner wall surface of the collar. The further section extends in the direction of the other circumferential edge of the collar body. A second guide part, which has a guide opening for the cable and is formed, in particular, by a curved pipe, is pivotally mounted on the first section of the adjoining first-mentioned guide part.

Abstract: A network contains a main pipe, a branch pipe leading to the main pipe, an electric data line laid in the main pipe and one laid in the individual connecting pipe, one central data distribution unit and a terminal unit. A data line is introduced into the main pipe and is connected to the data distribution unit, its other end laid in the system of pipes being configured as a transmitting or receive antenna. An additional data line is introduced into the system of pipes via the individual connecting pipe and is connected to the terminal unit with one end and another end is configured as a transmitting or receive antenna. The transmitting or receive antenna of the data line serving as an antenna and the transmitting or receive antenna of the additional data line form a pair of antennas between the antennas of which a radio link exists.

Abstract: A cable duct for guiding a plurality of cables is produced from an elastic material. The cable duct has an upper profiled part and a lower profiled part. The lateral end sections of the opposite profiled parts, in the position of use of the cable duct, terminate the cable duct as closing parts. The lateral end sections rest one on the other or are forced one against the other. The profiled parts are held together by retaining elements that can be immobilized by joining. Retaining elements are at the same distance to a center of a cross-section of the cable duct and at the same distance to the lateral end sections. Chambers for guiding lines or cables are delimited at both sides of the center and/or in the sections of the profiled parts that are laterally contiguous to the closing parts by the retaining elements.