Telephone cables with polyethylene insulation, with water-blocking materials, sheathed in polymer composites not containing

1 Conducting cores - single-wire from copper soft wire.
2 Insulation - in the form of a continuous concentric layer.
3 Pairs - twisted from insulated cores of different colours. Pairs together with strands of water-blocking materials are twisted into five or ten-pair elementary bundles.
4 Core - twisted from elementary bundles of different colours.
5 Belt insulation - made of polyamide, polyethylene, polyethylene terephthalate, polypropylene tapes and tapes of water blocking material.
6 Shield: aluminopolyethylene tape laid lengthwise. A tinned copper wire is laid longitudinally under the screen.
7 Sheath: halogen-free polymer composition.