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Note: Dual SIM failover still applies to the cell modem interface when the cell modem itself is used as
the console server's failover interface. Be aware that when the console server is failing over to
the cell modem interface and the primary SIM fails, total time to fail over to the cell modem and
then for the cell modem to failover to its secondary SIM can take several minutes - be patient.
5.7 Cellular Operation
When set up as a console server, the 3G cellular modem can be set up to connect to the carrier in either:
- Cellular router mode. In this case the dial-out connection to the carrier cellular network is always on,
and IP traffic is routed between the cellular connected network and the console server’s local network
ports. This is the default mode of operation for the LES1508A.
- OOB mode. As above, in this mode, the dial-out connection to the carrier cellular network is always on
- awaiting any incoming access (from a remote site wanting to access to the console server or
attached serial consoles/network hosts).
- Failover mode. In this case a dial-out cellular connection is only established if a ping fails.
- Circuit Switched Data (CSD) mode. In this dial-in mode, the cellular modem can receive incoming calls
from remote modems who dial a special Data Terminating number. This is a 3G mode only.
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