Iron Core PE insulated PVC sheathed telephone line 1.Copper-Clad 2.Iron-core PE 3.GB/T13849-83 4.YD/T630-93 Product Iron Core PE insulated PVC sheathed telephone line DescriptionCircular compacted stranded copper or Aluminum conductor assembled together with PVC filler and extruded with PVC outer sheath.Construction1. Conductor Plain circular compacted stranded copper or Aluminum conductor2. ...