Multiple WAN connection (MultiWAN), the most popular Internet Connection concept in Cuba, trying to take it to OpenWrt - Network and Wireless Configuration - OpenWrt Forum
How to configure Link Backup on Dual WAN Router using the new GUI | TP-Link
Unbreakable Multi-WAN Internet - wilink
TL-R605 | SafeStream Gigabit Multi-WAN VPN Router | TP-Link Australia