Cellular Failover for Dual WAN Routers Using IP Passthrough | WTI - Western Telematic, Inc.
The Ultimate Guide to Failover Solutions
Amazon.com: Peplink Automatic Failover 4G LTE Mobile Router : Electronics
Amazon.com: Teltonika RUT955K031Y0 Model RUT955 Industrial Cellular Router; Dual SIM; 4G LTE (Cat 4), 3G, 2G Connectivity; for use with Verizon; Auto Failover; Auto APN; Up to 100 Wi-Fi Users : Cell