The Telephone Line is the telephone into the household line, connected to the telephone machine, to make a call. It is divided into 2 cores and 4 cores. Telephone Cable include 4 Core Telephone Cable and 6 Core Telephone Cable as well as 8 Core Telephone Cable. There are three kinds of conductor materials: copper-clad steel, copper-clad aluminum and all-copper. The all-copper conductor has the best effect.Communication engineering cabling, indoor telephone Communication Cable system cabling between the connection, voice communication system between the main trunk, program controlled exchange, telephone. Our factory also supply Cat8 Ethenet Cable as well as CAT7 Ethernet Cable and Cat6 Patch Cable.