The tower with the RF above it indicates that you have the TSU9600 and RFX9400 set to Stand Alone Mode (Ad Hoc Mode). This is where the TSU9600 and RFX9400 are communicating with each other directly via WiFi. You will only see the signal strength bars above the tower when the TSU9600 and RFX9400 are set to Network Mode. In Network Mode the TSU9600 and RFX9400 communicate with each other across your wireless network, wireless from the TSU9600 to your wireless router, then via ethernet or wireless from there to your RFX9400.