Twisted pair cable

Twisted pair cable is a transmission medium formed by encapsulating a pair or more of a pair of twisted pairs in an insulating jacket. It is currently the most commonly used wiring material for local area networks. In order to reduce the degree of signal interference, each pair of twisted pairs in the cable is generally formed by twisting two insulated copper wires, and the twisted pair is also named. Twisted-pair cable is generally used for the wiring connection of the star network. RJ-45 heads (crystal heads) are installed at both ends to connect the network card and the hub. The maximum network cable length is 100 meters. Repeaters can be installed between the strands, and up to 4 repeaters can be installed. Twisted-pair cable is divided into two categories: unshielded twisted-pair cable (UTP) and shielded twisted-pair cable (STP). Unshielded twisted-pair cable in the LAN is divided into four types: category 3, category 4, category 5, and category 5; Twisted-pair cable is divided into three types and five types.

Coaxial cable

The coaxial cable is composed of a hollow outer cylindrical conductor and an inner conductor located on the central axis. The inner wire and the cylindrical conductor are separated from the outside by insulating materials. According to different transmission frequency bands, coaxial cables can be divided into two types: baseband coaxial cables and broadband coaxial cables. According to different diameters, coaxial cables can be divided into thick cables and thin cables.

Flat cable

Including work area wiring ports, distribution cables and connecting hardware in telecommunications cabinets.