A cellular mobile communications network includes a base station controller and an array of base transceiver stations. Each base transceiver station has a communications path connecting it to the base station controller such that when an uplink signal is received from a mobile station of the network by a plurality of the base transceiver stations of the array, each base transceiver station can transfer the received uplink signal via its communications path to the base station controller. The communications paths are assessed according to predetermined characteristics, and based on this assessment, at least one base transceiver station of the plurality is prevented from transferring the received uplink signal to the base station controller.