Cabling 25 Simplex It refers to data moving in a single direction. Half-duplex It means data travels in both ways, but in only one direction at a time. Full duplex It means data travels simultaneously in both directions. CABLING Cabling is a term that can refer to the act of installing the cable and the work performed before installation begins. Because coaxial cable and twisted-pair cable are copper cables, and fiber-optic cable uses glass or plastic fibers, different issues may arise for each type of cable. There are significant differences in how they are created and installed. Copper Cabling Installation of cable requires tools which are used to cut and strip the cable and to attach the proper connector to the end of the cable. Some of these tools may include the following: