icono-structured Structured cabling design and installation is governed by a set of standards that specify wiring data centers, offices, etc, for data or voice communications using various kinds of cable, most commonly category 5e (CAT-5e), category 6 (CAT-6), and fiber optic cabling and modular connectors. These standards define how to lay the cabling in various topologies in order to meet the needs of the customer, typically using a central, from where each modular connection can be used as needed.