R480T+ and ADSL Routers' LAN IP should be in different subnet to avooid IP conflict. It is strange to see what all IPs in the topology are in the same subnet. Change 480T+'s LAN IP to 10.10.11.210 to...

You should be R480T+ instead of R470T+. http://www.tp-link.com/en/article/?faqid=675

Password and Wireless Password are different. If you are trying to connnect to Wi-Fi network, you should type in Wireless Password which is 8 digits. Password is used to secure the powerline network...

E3531 is in your region's compatibility list. http://www.tp-link.com/en/support/3g-comp-list/?model=TL-MR3420&location=1249

You can login web interface of D9 when iMAC is connected to its LAN port, right? Any WAN IP address is obtained? iMAC is the only PC that you cannot access internet? Check IP settings and ensure it...

When we set up the extender successfully, the Wi-Fi name wil be the same as the root router except that we change it on web interface of WA850RE. 1. Indicators are normal according to your...