The communications cable is refers to uses in the short-range audio communication and the long-range radio-frequency carrier and the digital communication and the signaling electric cable, is our country one of five big electric cable products. According to communications cable's use and the use scope, may divide into six big serial productses, namely local service electric cable (including paper insulation local words cable, polyolefine insulation polyolefine protective covering local words cable), long-distance symmetrical cable (including paper insulation high low frequency long-distance symmetrical cable, copper core froth polyethylene high low frequency long-distance symmetrical cable as well as digital transmission long-distance symmetrical cable), coaxial cable (including small coaxial cable, coaxial and small coaxial cable), submarine cable (separable symmetrical seabed and coaxial submarine cable), fiber-optic cable (including traditional electric cable, belt-shaped array and skeleton three kinds), radio frequency electric cable (including symmetrical radio frequency and coaxialRadio frequency). The communications cable plant distributes the land. At present our country besides the production long-distance communications cable and the local words cable, the fiber-optic cable and the polyolefine insulation synthesis armor coat all modelled the local words cable also to have the considerable development, the domestic many factories and the Scientific research Unit started from the overseas introduction technology and the equipment to produce. Our country has the few polyolefine insulation polyolefine protective covering to model the telephone exchange area cable every year to sell to places such as Hong Kong and Macao, Southeast Asia and Middle East.