I used the backup FAQ "How to set up the 3G and 4G backup" https://www.tp-link.com/us/support/faq/2719/
I have my router in
- Operation Mode "Wireless Router Mode"
-Network/Internet/Static IP setup as Internet Connection.
The Internet is working fine via the MR600 and the ISP connection is working.
Now. the 3G/4G backup will work only if I disconnect the WAN/ISP cable.
The failover will not work if the ADSL router loose the connectivity (most frequent case as I have an un-reliable ADSL connection).
Is there a possibility to fix this? I saw in the MR600v2 user guide (https://static.tp-link.com/2020/202011/20201106/1910012928_Archer%20MR600(EU)_UG_REV2.0.0.pdf)
FAQ Q6 that there is a possilbity to define the Off-Line detection, will this feature be availanble on the MR600v1???
many thanks for your feedback