Ethernet 7,6 mm Matte blue PVC Flexible cable Category 5 cable, commonly known as Cat 5, is an unshielded twisted pair cable type designed for high signal integrity. This type of cable is often used in structured cabling for computer networks such as Ethernet, although it is also used to carry many other signals such as basic voice services, token ring, and ATM (at up to 155 MBit/s, over short distances). Category 5 cable includes four twisted pairs in a single cable jacket. It is most commonly used f