1. The diameter of conductor, annealing bared copper and copper is 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, and 0.9mm;
    2. Dielectric wire: solid (or foam, foam skin) polyolefin dielectric wire, according to YD/T322, the dielectric wire can have ten kinds of color;
    3. Dielectric pair: according to prescriptive chromatogram arrange, twisting two dielectric wires into pairs according to 25 different pitches;
    4. Structure of cable core: regard 25 pairs as essential unit, the pair more than 25 pairs according to unit arrange, every unit shall be bond by standard color for identification. Cable with 100 pairs or more than 100 pairs can add 1% preliminary pairs, but those shall not more than 6 pairs.
    5. Filled cable shall fully fill the interstices between cable core and the interstices between cable cores and tape with mixture.
    6. Cable core tape: polyester film and non-hygroscopic dielectric tape should be applied or applied longitudinally.
    7. Shield: the two faces plastic coated aluminum tape, with its thickness of 0.3mm, applied longitudinally outside of the cable core with an adequate overlap.
    8. Sheath: extruding a layer of low consistency, low consistency wire ability and middle consistency polyethylene sheath material. Sheath bond with the metal layer.
    9. Identification and length marker: printing permanent white and green marker outside of the cable, the marker includes: cable type, style, manufacturer’s name, trademark, manufacturing time, etc. The interstice between two markers is 1 meter. Identification of cable end: red is End A, green is End B.