types of data communication cable underground

 What is the sepecfication of telephone cable?

    1, Bare solid or stranded copper conductor 24AWG
      2, Color-Coded-PE insulation.
      3, Pass UL Riser Flame test and CSA FT4 Flame test.
      4, Electrical Properties:
          Dc-Resistance at 20 9.38W/100m (24AWG)
          Dc-Resistance at 20 15.00/100m (26WG)
          DC-Resistance unbalance Max.5%
      5, Impedance at 1-100MHz:100±15%
      6, Physical Properties:
          Insulation elongation:≥300%
          Insulation Strength: ≥8.23Mpa
      7, Ageing condition:113±2 168hour
      8, Insulation elongation Withhold rate: ≥75%
           Insulation Strength Withhold rate: ≥75%
      9, Sheath elongation:≥100%
           Sheath Strength: ≥10.34Mpa
     10, Ageing condition:113±2 168hour
     11, Sheath elongation Withhold rate: ≥75%
     12, Sheath Strength Withhold rate: ≥75%