The assignment was to acquire data on existing network elements from registry records and network inventories. The range of works covered the area of the whole country focusing on the cities of: Krakow, Lublin, Cieszyn, Chelm, Legnica, Walbrzych, Zielona Gora, Gorzow, Milicz, Leszno, Lodz, Opole, Pila, Sieradz, Wroclaw and Gora. The data found was entered into the National Inventory System ‘Pastel’ which allows not only to register the infrastructure but also to manage the network resources and business processes.