The reader can find a summary of metallic structured cabling in this thesis. It means there is described progress of this cabling and the specifications of the cabling systems. There are also described all types of these cables and some of connectors. The types of cable are summed in the table at the end of this part. In another part there are shown some aplications used for structured cabling. In the futher part there are described tests defined in the specifications in more detail. The most importatnt part of this thesis is focused on various tests. Firstly, there were chosen typical representative of the cables. It was: the data cable (Category 6), S/STP and MediaTwist cable. These cables were underwent the standard tests described above...