Installation guide

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.
On a Cisco 1600 series router, turn OFF power to 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.