I've just plugged in my new powerline extender and compared with my TL-WPA8630P, ethernet and wifi performnace is very poor using the same power socket. I'm doing some digging and I've noticed that the wifi Country Code is set to DE rather than GB - my TL-WPA8630P is set to GB. I've tried to Telnet to it and I get a login prompt but my credentials don't work - Access Denied.
Powerline device: TL-PA8010P 2.0.
Is it possible to get to the CLI? I have no issues with accessing advanced settings on on my TP-Link CPEs :)