Optical communication cable type OKZ

Cable for laying in cable ducts, tunnels, collectors, for laying on bridges and overpasses, inside buildings and structures, in soils of 1-3 groups, in operation from minus 50 ° C to 60 °.
The outer sheath is made of polymer compositions with consideration of application: at cable entry into the premises from polymer compositions not spreading burning; in other cases - from polyethylene; power elements from aramid threads or glass roving or without them, power elements from 2 round steel wires or without them; inner sheath from polyethylene or without it; optical modules twisted around the central power element.
Optical characteristics:
Attenuation coefficient of single-mode optical fibres (core/shell dimensions 9/125) at wavelength 1310 nm not more than 0.36 dB/km, at wavelength 1550 nm not more than 0.22 dB/km.
The attenuation coefficient of multimode optical fibres (core/shell dimensions 50/125) at a wavelength of 850 nm is not more than 3.0 dB/km, at a wavelength of...