The invention concerns a temporary radio base station, temporary RBS (140), which can gain and maintain control of the traffic to and from a targeted radio base station (120) in a wireless cellular telecommunications system (100), and a dedicated user terminal (530) for use the system. The dedicated user terminal (530) comprises an identification device being arranged to identify the temporary RBS (140) by use of unique information being at least embedded in a transmitted signal from the temporary RBS (140). The dedicated user terminal (530) is arranged to disregard the temporary RBS (140) when detected, and to choose the targeted RBS (120), or an RBS arranged to operate in a neighbouring cell, in the same manner as if the temporary RBS (140) would not exist. The invention also relates to a method for the devices and a system comprising the devices.