Dear John,
CF is only representation of DXU state in the RBS and TG is represent which cell are connected to the Transceiver Group. TG is used when we have problem with MO,which affected to the cell.So if you want to loading new software to the RBS,it should be reset the TG,other way you only reset the CF(DXU) to maintain the local problem on the RBS(especially when the DXU Fail to loading caused by Power or Transmission Problem)