@Arobo I know it's been forever, but I have the same issue with a TL-ER6120. Cannot get the web admin to respond. I can telnet but have no idea what I can do from there. Did you ever figure it out?

@Dan_C. I too have an ER4 (have had for a while, at first using Ubiquiti AP PRO's but those were slow, had bad range and were flakey). Switched to Deco M9 Plus set of 3 in wired backhaul mode and was...

@TP-Link Shall I post them here or via reply to the email you sent me?

Just replaced M9 Deco's with X60 Deco's. All are in AP mode and all are wired (wired baackhaul for #2 and #3 X60's). I have Gigabit service and the speedtest in the Deco app shows >900Mbps down....