Wireless Failover: What to do When Your Internet Goes Out - NationalLink Inc.
How Failover/Failback Function Works?
Networking: Use cellular as an internet gateway (IP Passthrough) – Opengear Help Desk
Amazon.com: CSG m106 LTE Gateway Router, Verizon 4G LTE Router, Built-in Failover and Hours of Backup Battery Power : 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