Accepted Solutions
HI there not hot swappable so make sure you power down the unit first , they just screw into the available slots then and you power back on and check the show inventory and show ip int brie make sure it took correctly
Step 1 
Power off the router by turning OFF the DC power source at the circuit breaker and taping the circuit breaker into the OFF position. To channel ESD voltages to the ground, do not remove the wire from the ground lug.
Warning Before performing any of the following procedures, ensure that power is removed from the DC circuit. To ensure that all power is OFF, locate the circuit breaker on the panel board that services the DC circuit, switch the circuit breaker to the OFF position, and tape the switch handle of the circuit breaker in the OFF position.
Step 2 Remove all network interface cables, including telephone cables, from the front panel.
Step 3 Use either a number 2 Phillips screwdriver or a small flat-blade screwdriver to remove the blank filler panel from the network module slot where you plan to install the card. Save the filler panel for future use.
Step 4 Align the card with the guides in the two-slot network module and slide it gently into the slot.
Step 5 Push the card into place until you feel its edge connector mate securely with the connector.
Step 6 Fasten the card's captive mounting screws into the holes in the network module faceplate using the Phillips or flat-blade screwdriver.
Step 7 If the router was previously running, reinstall the network interface cables and turn on power to the router.
HI there not hot swappable so make sure you power down the unit first , they just screw into the available slots then and you power back on and check the show inventory and show ip int brie make sure it took correctly
Step 1 Power off the router by turning OFF the DC power source at the circuit breaker and taping the circuit breaker into the OFF position. To channel ESD voltages to the ground, do not remove the wire from the ground lug.
Warning Before performing any of the following procedures, ensure that power is removed from the DC circuit. To ensure that all power is OFF, locate the circuit breaker on the panel board that services the DC circuit, switch the circuit breaker to the OFF position, and tape the switch handle of the circuit breaker in the OFF position.
Step 2 Remove all network interface cables, including telephone cables, from the front panel.
Step 3 Use either a number 2 Phillips screwdriver or a small flat-blade screwdriver to remove the blank filler panel from the network module slot where you plan to install the card. Save the filler panel for future use.
Step 4 Align the card with the guides in the two-slot network module and slide it gently into the slot.
Step 5 Push the card into place until you feel its edge connector mate securely with the connector.
Step 6 Fasten the card's captive mounting screws into the holes in the network module faceplate using the Phillips or flat-blade screwdriver.
Step 7 If the router was previously running, reinstall the network interface cables and turn on power to the router.
