Abstract: A system and method control a cellular radiocommunications network, in particular according to the GSM standard. The system of control includes fixed means for the recording and time-stamping of signalling information travelling through at least one interface among the various types of interfaces capable of being observed (such as, in particular, the Abis, A, "CCITT signalling system No. 7" and MAP interfaces); fixed means for the centralization of the recorded and time-stamped signalling data; means for the association of localization information with said signalling information so as to precisely localize segments of said cellular network located downline from each interface on which signalling information is recorded.