Abstract: A telecommunication network planning and network control includes network installation procedures and a system for configuring a telecommunication network. More specifically, a method and system for configuring a telecommunication network relate to preparing a network element for operation, and giving an address to a network element, where each network element in the telecommunication network has an address of its own. The method and system are further characterized by a process in which each network element is made a subnetwork of its own, a common network-wide IP classification is selected, an IP address is created for each network element, a configuration file is created which includes at least IP address information in combination with a network element site identifier. The configuration file is stored in a control device, and the configuration file is loaded from the control device into the network element on the basis of the site identifier.