1Preparing for installationSafety recommendationsSafety symbolsWhen reading this document, note the following symbols:WARNING means an alert that calls attention to important information that if not understood orfollowed can result in personal injury.CAUTION means an alert that calls attention to important information that if not understood orfollowed can result in data loss, data corruption, or damage to hardware or software.General safety recommendations• Keep the chassis and installation tools away from walk areas.• Make sure the ground is dry and flat and anti-slip measures are in place.• Unplug all the external cables (including the power cord) before moving the chassis.Electricity safety• Locate the emergency power-off switch in the room before installation. Shut the power off at once incase accident occurs. Disconnect the power cord of the router if necessary.• Make sure the router is correctly grounded.• Do not open or close the chassis cover when the router is powered on.• Correctly connect the interface cables of the router.• Use an uninterrupted power supply (UPS).• Do not work alone when the router has power.• Always make sure the power has been disconnected during the installation and replacementprocedures.Examining the installation siteThe router can only be used indoors. To make sure the router operates correctly and to prolong its servicelifetime, the installation site must meet the following requirements.Temperature and humidityYou must maintain a proper temperature and humidity in the equipment room.