The PC installed WN823N is the only device connecting to the router wirelessly? You'd better use a phone, tablet etc. to test the wireless connection. How about signal strength detected? When...

I set Access Control rules as "Deny" for the "Default Filter Policy", is it necessary to add filters for the "Allow" mode as well...? Describe what you are trying to fulfill in details. You can refer...

Why did you buy a product for people in Mainland China? Unfortunately, it cannot be upgraded to English version. If you can return it, it is good. If not, it would be a headache to install it or use...

V2 is not available yet I guess. Not sure if there is any update in future for V1.2 since V2 is coming...

Wired connection to PA4020P and wireless connection to the main router cannot work simutaneously? When you cannot access internet wiring to PA4020P, what's the IP address obtained on the client?...

YES! TL-WPA4220KIT and TL-PA4020P are compatible with each other indeed.