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 comprises strands in film-polymer insulation, twisted in pairs with different pitching strands, with outer polymer shell, characterized by that insulation of each core is made in the form of microtubes of equal size throughout the entire section of each core, note here that part of microtubes is perforated throughout cable length along symmetrical cable length while outer film contacts microtubular insulation of every conductor over entire section of every conductor along length of symmetric cable.
EFFECT: invention provides reduction of attenuation factor due to reduction of losses in insulation of conductors, reduced 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 circuit decreases.
1 cl, 2 dwg
