Cisco Cisco 1900 2900 3900 Series 4-Port Gigabit Ethernet HS-WIC with PoE

The following features are available in the HSPA-U and HSPA+ versions of the EHWIC and 
fixed-platform SKUs:

The Dual SIM feature implements auto-switch and failover between two cellular networks on the 
C880G ISRs. This feature is enabled by default with SIM slot 0 being the primary slot and slot 1 being 
the secondary (failover) slot. 

The Dual SIM feature provides the following commands:

Note the following:

For auto-switch and failover to work, configure the SIM profile for slots 0 and 1 using the gsm sim 
profile command.

For auto-switch and failover to work, configure the chat script without a specific profile number. 

If no SIM profile is configured, profile #1 is used by default.

If no GSM failover timer is configured, the default failover timeout is 2 minutes.

If no GSM SIM primary slot is configured, the default primary SIM is slot 0.

This example shows how to set the SIM switchover timeout period to 3 minutes:

router# configure terminal

router(config-controller)# gsm failovertimer 3

This example shows how to authenticate using an unencrypted pin:

router(config-controller)# gsm sim authenticate 0 1234 slot 0

This example shows how to set the maximum number of SIM switchover retries to 20:

router(config-controller)# gsm sim max-retry 20

gsm failovertimer <1-7>

Sets the failover timer in minutes.

gsm sim authenticate <0,7> <pin> slot <0-1>

Verifies the SIM CHV1 code.

gsm sim max-retry <0-65535>

Specifies the maximum number of 
failover retries. The default value is 10.

gsm sim primary slot <0-1>

Modifies the primary slot assignment.

gsm sim profile <1-16> slot <0-1>

Configures the SIM profile.