A method for use in a cellular telephony network for enabling a call which is transferred from the control of a Femtocell base station to the control of a Macrocell base station to be returned to the original Femtocell again at a later point in time, said network comprising • a first number of cells of a first kind, each of which is able to accommodate at least a first number of user terminals, with each cell being controlled by a corresponding base station of a first kind, • a second number of cells of a second kind, each of which is able to accommodate at least a second number of user terminals, with each cell being controlled by a corresponding base station of a second kind, each of said second kind of cells representing a coverage area which is significantly smaller than the coverage area of each of said first kind of cells, and each of said second kind of cells being located in or adjacent to a cell of the first kind, • one or more base station controllers for controlling the base stations (111; 125-127), each of the one or more base station controllers including a first function for controlling base stations of the first kind and a second function for controlling base stations of the second kind, and • a mobile switching centre for handing over the control of user terminals (123, 112) from one base station to another base station, the method being for handing over an ongoing call of a user terminal in a cell of the second kind, controlled by second function of one of the one or more base station controllers, to a base station of the first kind, controlled by a first function, the method being characterized in that it comprises the step (6, 8, 16, 18) of: • the second function sending identifying information about the cell of the second kind to the first function, wherein the identifying information comprises a) measurement information for allowing the user terminal to measure the cell of the second kind and for allowing the network to identify such measurements as belonging to the specific cell of the second kind, b) routing information which enables the mobile switching centre to route a subsequent handover to the second function, and c) local information which, together with the routing information, identifies a specific cell of the second kind among the cells controlled by the second function, wherein the cells of the first kind are Macrocells and the cells of the second kind are Femtocells. • a first number of cells of a first kind, each of which is able to accommodate at least a first number of user terminals, with each cell being controlled by a corresponding base station of a first kind, • a second number of cells of a second kind, each of which is able to accommodate at least a second number of user terminals, with each cell being controlled by a corresponding base station of a second kind, each of said second kind of cells representing a coverage area which is significantly smaller than the coverage area of each of said first kind of cells, and each of said second kind of cells being located in or adjacent to a cell of the first kind, • one or more base station controllers for controlling the base stations (111; 125-127), each of the one or more base station controllers including a first function for controlling base stations of the first kind and a second function for controlling base stations of the second kind, and • a mobile switching centre for handing over the control of user terminals (123, 112) from one base station to another base station, • the second function sending identifying information about the cell of the second kind to the first function,