Two. ???? Nominal logarithmic: 5-2400

3. ???? Diameter of the conductor: copper wire diameter of 0.32, 0.40, 0.50, 0.60, 0.70, 0.80, 0.90mm;

4. ???? Insulating materials: high density polyethylene;

5 ???? Insulated single with extruded insulation material: continuous wire, using 10 kinds of standard chromatography in order to identify and to ensure that the electrical performance of the cable;

6. ???? Insulated wire: single insulated wire according to the different pitch twisted pairs to minimize crosstalk and with specified color combinations in order to identify the pair;

7. ???? The cable core structure: synthesis with core type or unit twist cable core, insulated single stranded pairs, each unit using a different tie yarn for the construction, maintenance and identification. 25 pairs as the basic unit of the 25 lines on the basic unit can be 12 pairs and 13 pairs of the two sub-units, 50 units of super-units from the two 12 and two 13 two sub-units, 100 pairs of super-units consists of four 25 basic units. Each unit is color coded around with a cable of 100 pairs and above plus 1% of the spare pairs, but up to more than 10 pairs;

8. ???? Cable core package with: cable core is coated with non-hygroscopic, non-oil absorption of the tape;

9. ???? Cable sheath: black low density, medium density or high density polyethylene;

10. ?? The identification tag: cable outer surface of the print identification mark. Tag: cable type, length, company name and year of manufacture. Marker interval of not more than 1m;

11. ?? Other structures: according to applications, user requirements, can provide various forms of cables to meet the requirements of a variety of laying of environmental conditions.