@Ochmin All hyperlinks in the thread you mentioned are viable except the thread about the recovery procedure, which is here. The latest FW for Archer c20i can downloaded from here. Usually, when you...

@Nick_F Good troubleshooting job. Thanks for the comprehensive feedback.

@PCH Normally, if the remote management is not enabled in the Administration page, you shouldn't be able to access the router WebGUI through your public IP address. I would contact the local tech...

@Goofus I would recommend TL-SG1005P (an unmanaged PnP switch) connected on its port 5 with the er7212p WAN port. I would advise you aso to set zlt x17 in bridge (modem-only) mode (if that's...

@Goofus According to its data specifications ZLT X17 power consumption is less than 18W (DC 12V/1.5A or PoE), Power budget of TL-POE50S is 15.4W (Max. 48VDC), so ZLT X17 operates at the limit of its...

@Nick_F That's a good idea - testing the setup with the TP-Link switch excluded. Thus, you'll going to determine whether the issue is caused by the switch itself or the unifi APs. Let us know the...