System Housing2-5# Item Description4 Parallel port Connects to parallel devices (e.g.,printer).5 USB ports Connects to USB devices.6 LAN port Connects to the network cable.7 COM 2 port Connects to serial devices (e.g., serialmouse).8 Hot-swap redundantfan fail LED 2Lights up (green) when the hot-swapredundant fan is working properly.9 COM 1 port Connects to serial devices (e.g., serialmouse).10 Hot-swap redundantfan fail LED 1Lights up (green) when the hot-swapredundant fan is working properly.11 Hot-swappableredundant PowerSupply ModulesRemovable and installable even whenthe system is operating. See section2.5.12 Power supply powerLEDLights up (green) when the powersupply is on.13 Power supply fan failLEDLights up (Yellow) when one of thepower supply fans is faulty * .14 Power cableconnectorConnects to the power cable.15 Fan module fail LED Lights up (Yellow) when one or twofans are faulty.16 Fan module(includes two fans)The fan module is used in place of thethird power supply module if one is notavailable.* The power supply has two cooling fans. If both fans fail to operate, the power supplymodule will shut down. The LED indicators of the power supply module will be turnedoff.If the fans are functioning properly and the power supply fails, the fans will keepoperating.