Patent ID: 7910835

Claim:
In communication cable of high capacity, conductor of diameter d is coated by insulation material to form wire of diameter D, plural number of wires are twisted by pitch p to form pairs, plural number of said pairs are twisted by collective pitch P, wherein, said communication cable of high capacity comprise sheath wrapping said pairs, the impedance (Z) of said wire is from 90 to 110, diameter (d) of said conductor is from 0.53 mm to 0.65 mm, diameter (D) of said wire is from 0.9 mm to 1.1 mm, pitches (p) of said pairs are from 8 mm to 25 mm, collective pitch (P) is from 40 to 150 mm, relative ratio of diameter of wires to diameter of conductor D/d is from 1.625 to 1.835.