Hello, i am struggeling to find out how to setup the TRB140 (Ethernet output) as a failover link / dual wan Fon my RUT300. I have a main DSL line but want a 4G LTE as failover since the DSL is quite unstable at times. I cannot seem to find a single source of «how-to» that matches this use-case. All firmwares are the latest available from Teltonika.