
Installing WAN and Voice Interface Cards in a Cisco Modular Router 2-11
Inserting the Card in the Router
Follow this procedure to install the WAN interface card in the router:
Step 1 On the Cisco 1720 router, turn the power switch to the STANDBY position, and
disconnect the power cable from the power socket on the rear panel.
OnaCisco 1600 series router,turn OFFpowerto the router. However, to channel
ESD voltages to ground, do not unplug the power cable.
Step 2 Remove all network interface cables, including telephone cables, from the rear
panel.
Step 3 Use either a number 2 Phillips screwdriver or a small flat-blade screwdriver to
remove the filler panel from the WAN interface card slot. (See
Figure 2-7.) Save the filler panel for future use.
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