Abstract: A method is disclosed for performing a reconfiguration of a cellular telecommunications network, for example in the event that a base station becomes inoperative, or if it becomes necessary to increase traffic capacity by splitting a cell. Each base station controller, and an operator support system, each include a database containing prestored sets of parameters or cell profiles. If one of these stored cell profiles is suitable for use in a reconfiguration, it can be selected at the operator support system, and then retrieved from the database in each affected base station controller. This avoids the need to carry out consistency checks on the cell profile, because it will have been checked before being stored. Moreover, only a simple command needs to be sent to the base station controller, and it is not necessary to transmit the complete file containing all of the cell parameters. Thus reconfigurations can be carried out more efficiently.