FIELD: electrical engineering.
SUBSTANCE: invention relates to electrical engineering and can be used in makeups of symmetric communication cables within a shared network or structured cable systems. Symmetric four-pair cable includes strands in film-polymer insulation, twisted in pairs with different pitching strings, with outer polymer shell, characterized by that insulation of each core is made in the form of nano and microtubes of different size throughout the entire section of each core, wherein the nanotubes and the microtubes regularly alternate over the entire section of the core over the entire length of the symmetrical cable, and the outer film is in contact with the microtubular insulation of each core throughout the entire cross-section of each core along the entire length of the symmetrical cable.
EFFECT: invention provides reduction of attenuation factor due to reduction of losses in insulation of cores, wave resistance and capacitive component of influence between pairs, and due to reduction of thickness of insulation and, consequently, distance between strands in pair, inductance of chain also decreases.
1 cl, 2 dwg
