 This conflicted with international callsign allocations (the ITU prefix CS is assigned to Portugal, not Canada), so a new application was made for the callsign CIMN (Campus Information Music & News).A series of transmitters, using the electrical wiring of buildings as the antenna system, were located in the various residences.A set of control rooms and production studios located on the 4th floor of Main Building remained in operation for a number of years.