telephone cable 1,Conductor: solid copper 2,Insulation: PVC 3,Jacket: PVC, fire-retardant PE telephone cable: 1,Conductor: solid copper2,Insulation: PE3,Jacket: PVC, fire-retardant PE or PE Specification1Px0.5mm2Px0.5mm3Px0.5mm4Px0.5mm indoor 2 pair telephone cable