step 1 power off the router. however, to channel esd voltages to ground, do not unplug the power cable.
before opening the chassis, disconnect the telephone-network cables to avoid contact with telephone-network voltages. to see translations of the various warnings that appear in this publication, refer to the regulatory compliance and safety information document that accompanied this device.
step 2 disconnect all network interface cables from the rear panel.
step 3 place the router on a flat surface. remove the five screws located on top of the cover.
step 4 rotate the cover up to a 45-degree angle. (see figure 5-3.)
step 5 slide the cover to the side until the tabs are free from the slots. (see figure 5-3.)
