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Cisco 819 Series Integrated Services Router Software Configuration Guide
OL-23590-02
Chapter 5 Basic Router Configuration
Configuring WAN Interfaces
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script dialer hspa+
modem InOut
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transport input all
Configuring Dual SIM for Cellular Networks
The Dual SIM feature implements auto-switch and failover between two cellular networks on a Cisco
819 ISR. This feature is enabled by default with SIM slot 0 being the primary slot and slot 1 being the
secondary (failover) slot.
Note For instructions on how to configure the Dual SIM feature for 4G LTE cellular networks, see the Cisco
4G LTE Software Installation Guide.
You can configure the Dual SIM feature using 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.
The following example shows you how to set the SIM switchover timeout period to 3 minutes:
router(config-controller)# gsm failovertimer 3
The following example shows you how to authenticate using an unencrypted pin:
router(config-controller)# gsm sim authenticate 0 1234 slot 0
The following example shows you how to set the maximum number of SIM switchover retries to 20:
router(config-controller)# gsm sim max-retry 20
The following example shows you how to set SIM slot 1 as the primary slot:
router(config-controller)# gsm sim primary slot 1
Command Syntax Description
gsm failovertimer
gsm failovertimer <1-7>
Sets the failover timer in minutes.
gsm sim authenticate
gsm sim authenticate <0,7> <pin> slot <0-1>
Verifies the SIM CHV1 code.
gsm sim max-retry
gsm sim max-retry <0-65535>
Specifies the maximum number of
failover retries. The default value is 10.
gsm sim primary slot
gsm sim primary slot <0-1>
Modifies the primary slot assignment.
gsm sim profile
gsm sim profile <1-16> slot <0-1>
Configures the SIM profile.