onfigurations are known detailed planning can be started. The detailed planning phase includes frequency, adjacency and parameter planning. Planning tools have frequency planning algorithms for automatic frequency planning. These require parameter setting and prioritization for the parameters as an input for the iteration. The planning tool can also be utilised in manual frequency planning. The tool uses interference calculation algorithms and the target is to minimise firstly the co-channel interference and also to find as low an adjacent channel interference as possible. Frequency planning is a critical phase in network planning. The number of frequencies that can be used is always limited and therefore the task here is to find the best possible solution. Neighbour planning is normally done with the coverage planning tool using the frequency plan infor- mation. The basic rule is to take the neighbouring cells from the first two tiers of the surrounding BTSs: all cells from the first circle and cells pointing to the target cell from the second circle. In the parameter planning phase a recommended parameter setting is allocated for each network element. For radio planning the responsibility is to allocate parameters such as handover control and power control and define the location areas and set the parameters accordingly. In case advanced system features and services are in use care must be taken with parameter planning. The output of the detailed planning phase is the frequency plan, adjacencies and the parameter plan. Verification and Acceptance After the planning phase has been finished the aim of the prelaunch optimisation phase is to ensure optimal operation of the network. In addition to fine-tuning a search is made for possible mistakes that might have occurred during the installation. Prelaunch optimisation is high level optimisation but does not go into detail. Network optimisation continues after the launch and goes into a more detailed level. At that point the detailed level is easier to reach due to 