Twisted-pair outdoor telephone wire Flat telephone cable Round Telephone cable Twisted-pair Outdoor Telephone WireStandards:UL20251Sranded Bare or Tinned Copper Conductor or Tinest WirePP InsulationPVC jacket2 core, 4 core, 6 core, 8 coreRound Telephone CableStandards:IEC189,BS4808Solid Bare or Tinned Copper ConductorPVC insulationCores twisted as pair typePVC jacket2, 4, 6, 8, 10, 25 coreWe also ...