High-frequency cables for digital networks of rural

1 Conducting cores - single-wire from copper soft round wire with nominal diameter 0,90 and 1,20 mm. 2 Insulation - film-porous-film (three-layer, consisting of solid, porous and solid layers of polyethylene). 3 Core - twisted from four insulated cores around a cordel-filler.

In a quadruple, two cores arranged diagonally form a working pair, the insulation of the cores of the first pair of the quadruple has a natural colour, the second pair - blue. The free space of the core is filled with hydrophobic filler. 4 Belt insulation - of extruded polyethylene.

5 Shield - aluminium or aluminopolyethylene tape, nominal thickness of aluminium shield not less than 0,08 mm with tinned copper wire laid under it. 6 Armour - overlaid over the screen is armour made of steel tape of nominal thickness of 0.1 mm with bituminous coating. 7 Sheath - polyethylene.