telephone cable 1:conductor :copper 2:Type:HYY 3:PE insulation, ... ,4 pairs 0.4, 0.5 ,0.6, 0.7mm telephone cableDescription:1/ Conductor :solid copper,size 0.4, 0.5 ... ,0.6, 0.7mm2/ used in outerdoor 2, 4 cores3/ Standards: ISO/IEC 11801, ANSI/TIA ... : Undercarpet or surface wiring.Color: black or customer design. HYY telephone cable