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Cisco Integrated Services Router Hardware Installation Guide
OL-27407-01
Chapter2 Installing the Router
Installing the Cisco 860, 880, 890 ISR
Step5 Connect the chassis to a reliable earth ground. For the chassis ground connection procedures, see the
“Installing Cisco 890 Series in a Rack” section on page2-52.
Installing the C881G-B/S/V-K9 ISR
To install the C881G-B/S/V-K9 ISR, follow the instructions in the “Installing the Cisco 860, 880, and
890 Series Routers” section on page 2-40.
However, the instructions for connecting the 3G card in the hardware installation guide do not apply to
the C881G-B/S/V-K9 ISR because it does not have a slot for adding a SIM card. These are
CDMA/EV-DO based routers and do not require a SIM card.

Installing Antennas

For instructions on installing the antennas for the Cisco 881 routers, please refer to the “Installing
Antennas” section on page 2-54.
Installing the C881GW-S/V-A-K9 ISR
To install the C881GW-S-A-K9 and C881GW-V-A-K9 ISRs, follow the instructions in the “Installing
the Cisco 860, 880, and 890 Series Routers” section on page2-40 section.
However, the instructions for connecting the 3G card in the hardware installation guide do not apply
because these ISRs do not have a slot for adding a 3G card. Instead, a 3G modem is embedded in the
router.

Installing Antennas

For instructions on installing the antennas for the Cisco 881 routers, please refer to the “Installing
Antennas” section on page 2-54.
Installing the C881G-U-K9 ISR
To install the C881G-U-K9 ISR, follow the instructions in the “Installing the Cisco 860, 880, and 890
Series Routers” section on page2-40.
However, the instructions for connecting the 3G card in the hardware installation guide do not apply to
the C881G-U-K9 ISR because it does not have a slot for adding a 3G card. Instead, a 3G modem is
embedded in the router.

Installing the SIM Cards

You can install one or two SIM cards into the C881G-U-K9 ISR. Installing two SIM cards lets you take
advantage of the Dual SIM feature, which provides a failover mechanism in case the primary SIM card
fails.
Figure 45 shows the SIM car installation steps.