Tripp Lite B093-004-2E4U-V Owner's Manual

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5. Firewall, Failover and OOB Access

5.6.4 Dual SIM Failover

Some console server models allow you to insert two SIM cards so you can selectively connect to two carrier networks. The

dual SIM failover feature allows the cell modem to selectively failover to the secondary SIM when communications over the

primary SIM fails.

To conﬁgure dual SIM failover, you need to:

• Choose which of the SIMs is to be the Primary, and the other SIM will be the secondary/failover. It is recommended that an

explicit slot is chosen, rather than leaving it on Automatic. Select Internal Cellular Modem panel on the System: Dial

menu nominate which slot (Top or Bottom) contains the Primary.

• Check Enable SIM Failover.

• Specify how the device will Failback from the failover SIM to the Primary SIM. There are two options

o The ‘On Disconnect’ failback option will failback to the Primary SIM only after the connection on the failover SIM has

failed its ping test.

o The ‘On Timeout’ failback option will failback to the Primary SIM after the connection on the failover SIM has been up

for the timeout period. The timeout period is either the default value of 600 seconds if the Failback Timeout ﬁeld is left

empty or the number of seconds you have speciﬁed in the Failback Timeout ﬁeld.

• Next, you will need to conﬁgure each SIM connection with as much information (e.g. APN, etc.), such that it will make a

successful connection, assuming sufﬁcient signal strength from the cell service provider.

• Enter a Failback Test IP address for each SIM. This IP address is used to ping test the status of the cell modem connection

and to determine if SIM failover or failback is to take place.

• Conﬁguring DDNS and the Modem Watchdog are optional. DDNS, when conﬁgured, will be applied to the cell modem dial

out connection regardless of which SIM is currently in use. Dual SIM failover is for dial out connections only.

5.6.5 Automatic SIM Slot Detection

If a single SIM card is used in a Dual SIM slot product, the default conﬁguration for the product is to automatically detect

which slot the SIM is in and select that slot. If both slots are populated, the bottom SIM slot will be used in preference.

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Tripp Lite B093-004-2E4U-V 4-Port Console Server with 4G LTE Cellular Gateway, Dual GbE NIC, 4Gb Flash and Dual SIM