Automatic Sim Switching - Sierra Wireless AirLink RV50 Series User Manual

Field
Switch Active SIM
Active SIM Based
Firmware Switching
Rev 1 Dec. 17
Description
If the gateway has two SIM cards installed, click the Switch Active SIM button to switch
to the inactive SIM card. No reboot is required, but you may need to refresh the screen
in order to see the change.
Enable or disable SIM-based radio module image switching.
Enable—Allows SIM switches to also trigger radio module firmware image
•
switches if installed SIM cards require different radio module firmware.
When enabled, the Active Radio Module Firmware status appears, and the range
of the Secondary Network Timeout changes from 10–255 minutes to 1–5 hours
(1 default).
Note: Enable this feature for fixed (stationary) applications only. Ensure that the
Network Watchdog Timer and Cellular Watchdog timer are disabled. Otherwise, the
gateway could reboot and switch back to the primary SIM (which is normal SIM
switching behavior) while cellular service is still relying on the secondary network for its
connection.
Note: The firmware image switch can take 5 to 10 minutes. During this time, the WAN
interface connection will be interrupted.
Disable—The gateway does not automatically select the appropriate radio module
•
firmware when SIM switching occurs. You can manually switch the active SIM and
then manually switch the radio module firmware (see
Module Firmware on page

Automatic SIM switching

If you have two SIM cards installed, you can use the Automatic SIM switching
fields to configure the circumstances in which the gateway automatically switches
the SIM card being used for network connectivity. The configurable cases are:
• Service Loss—switch SIMs if the data connection is lost for x minutes
• Roaming—switch SIMs if roaming for x minutes
• Secondary network—if the gateway has been connected to the secondary
SIM for x minutes, switch to the primary SIM. Use this parameter if you prefer
the gateway to use the primary SIM whenever possible.
• Scan Timeout—After a Service Loss Timeout and an attempted switch to the
secondary SIM, the Scan Timeout switches the gateway back to the primary
SIM if no connection is made during the timeout. Similarly, if the gateway
does not connect to the primary cellular network after startup or reboot, the
Scan Timeout triggers the gateway to use the secondary SIM.
These settings work together, so it's important to plan how you want automatic
SIM switching to work before configuring these fields.
Note: Sierra Wireless recommends that whenever you configure automatic SIM switching,
you include a setting for Scan Timeout. This helps to ensure that if the desired network is
not available, the gateway maintains a data connection by attempting to connect to the
other network.
73
WAN/Cellular Configuration
329).
Manually Selecting the Radio
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