A structured cabling system (SCS) is a set of switching elements (cables, connectors, connectors, cross panels and cabinets), as well as a method of their joint use, which allows you to create regular, easily expandable communication structures in computer networks.

A structured cabling system is a kind of "designer", with which the network designer builds the configuration he needs from standard cables connected by standard connectors and switched on standard cross-over panels.  If necessary, the connection configuration can be easily changed - add a computer, segment, switch, remove unnecessary equipment, and also change connections between computers and hubs.

When building a structured cabling system, it is assumed that every workplace in an enterprise must be equipped with sockets for connecting a telephone and a computer, even if it is not currently required.  That is, a good structured cable system is built redundant.  In the future, this can save money, as changes in the connection of new devices can be made by re-switching the already laid cables.

The structured cable system is planned and constructed hierarchically, with the mainline and numerous branches from it.

 A typical hierarchical structure of a structured cabling system includes:

  horizontal cable subsystems (within the floor);
  vertical cable subsystems (inside the building);
  the main cable subsystem of the campus (within the same territory with several buildings);
  cable subsystem jobs.