How do E-Lins routers with failover work?

Failover makes the routers automatically switch to an alternative connection if the main connection fails. E-Lins dual sim 4g routers support failover between wired-WAN and Cell-WAN.

Failover is the rapid deployment of redundant or standby servers, systems, hardware, or networks to take over when active services or applications are terminated unexpectedly. A failover is basically the same as a switch, except that it is usually done automatically and manually without warning, whereas a switch needs to be done manually. In layman's terms, when A is unable to provide service for the customer, the system can automatically switch, so that B can continue to provide service for the customer in time, and the customer does not feel that the service object has been changed.

All E-Lins routers are with the failover feature. They offer both internets via a landline (Wired-WAN) and SIM card (Cell WAN). E-Lins dual sim 4g routers with the failover feature also offer internet over WiFi and have 2 SIM slots (dual SIM), such as H720, and H900 models.

In E-Lins router configuration page, you can set the WAN to automatically switch to another WAN connection if the primary connection fails. For example, if the wired WAN fails, it will switch to SIM. Or SIM 1 fails and switch to SIM 2 like E-Lins dual sim 4g router supports. As soon as the main connection works again, they switch back to the main connection as soon as possible, which is called fallback. In the meantime, it should be noted that, when load balance function is enabled, the sim switch and failover function must disabled, they could not work at the same time.